As I stood in my kitchen, the vibrant pink stalks of rhubarb caught my eye, evoking memories of springtime desserts. I knew right away that I wanted to create something special—this Keto Crustless Rhubarb Custard Pie was born from that inspiration. With a beautiful balance of tangy rhubarb and a silky custard, this gluten-free delight caters to anyone looking for a low carb dessert that doesn’t skimp on taste. One of the best perks? It’s incredibly quick to prepare and can be served either warm or chilled, making it the perfect versatile treat for any occasion. Whether you’re celebrating with friends or simply enjoying a peaceful evening at home, this pie promises to be a refreshing, guilt-free indulgence. Curious about how to whip up this delightful dessert? Let’s dive into the recipe!

Why is this pie a must-try?
Simplicity: You’ll find this pie surprisingly easy to make, featuring just a few wholesome ingredients that come together in no time.
Versatile Delight: Serve it warm for a comforting experience or chill it for a refreshing treat that’s equally delicious.
Flavor Explosion: The tangy rhubarb combined with creamy custard creates a symphony of flavors, leaving your taste buds dancing with delight.
Keto-Friendly: With just 3g of carbohydrates per serving, it’s perfect for those following a low-carb lifestyle. Plus, anyone looking for a Keto dessert will love it!
Crowd-Pleaser: Friends and family will rave about this unique dessert, especially paired with whipped cream or a scoop of sugar-free ice cream. This Crustless Rhubarb Custard Pie is bound to become a favorite at gatherings!
Crustless Rhubarb Custard Pie Ingredients
For the Filling
• Rhubarb – This provides tanginess and is the primary flavor; use fresh rhubarb for the best results.
• Allulose (or other low carb sweetener) – This adds sweetness without the carbs; erythritol or stevia are good substitutes if preferred.
• Water – This helps to soften rhubarb during cooking; adjust based on your preferred texture.
For the Custard
• Eggs – Essential for giving the custard structure and richness; bring them to room temperature for better blending.
• Heavy Cream – Creates a rich, velvety texture; coconut cream is a great dairy-free alternative.
• Melted Butter – Adds moisture and depth of flavor; try coconut oil for a dairy-free option.
• Vanilla Extract – Enhances the overall flavor; always reach for pure vanilla for the best taste.
• Orange Zest – Provides a citrusy aroma; you can omit this or replace it with lemon zest for a different twist.
Optional Enhancements
• Spices (like nutmeg or cardamom) – Add for extra complexity; they complement the flavors beautifully.
• Low-carb fruits (like strawberries or blueberries) – Toss them in for a colorful and flavorful twist on this Keto dessert.
This Crustless Rhubarb Custard Pie offers all the happiness of a traditional pie without the fuss of a crust! Get ready to treat yourself to this delightful, low carb dessert that won’t disappoint.
Step‑by‑Step Instructions for Crustless Rhubarb Custard Pie
Step 1: Preheat the Oven
Begin by preheating your oven to 180°C (350°F). This temperature is crucial for achieving that perfect golden custard texture. While the oven warms up, take a moment to gather your ingredients and equipment, including a 9-inch baking dish, a saucepan, and a mixing bowl, setting you up for success in making your Crustless Rhubarb Custard Pie.
Step 2: Cook the Rhubarb
In a medium-sized saucepan, combine chopped fresh rhubarb, allulose, and just enough water to cover the bottom. Cook over medium heat for about 5-10 minutes, stirring occasionally until the rhubarb becomes tender and begins to break down. You want a vibrant, soft mixture that will give your pie its delightful tanginess.
Step 3: Prepare the Custard Mixture
In a mixing bowl, whisk together heavy cream, eggs, remaining allulose, vanilla extract, melted butter, and orange zest until the mixture is smooth and creamy. This should take about 2-3 minutes. Look for a well-blended custard with a rich consistency, which will beautifully complement the tangy rhubarb in your Crustless Rhubarb Custard Pie.
Step 4: Combine Rhubarb and Custard
Once the rhubarb is cooked and tender, transfer it into your prepared 9-inch baking dish. Pour the custard mixture evenly over the rhubarb, ensuring all the fruit is submerged. This layering allows the flavors to meld beautifully while baking, resulting in a luscious dessert that highlights the fresh rhubarb.
Step 5: Set Up a Water Bath
To promote even baking, place the baking dish with the rhubarb and custard into a larger dish filled with hot water. This water bath method helps in creating a gently baked custard. Ensure the water reaches about halfway up the sides of the baking dish, providing a consistent heat for your Crustless Rhubarb Custard Pie.
Step 6: Bake the Pie
Carefully transfer the setup to the preheated oven and bake for 50 minutes. You’ll know it’s ready when the custard is slightly firm at the center and has a beautiful golden hue on top. Keep an eye on it to prevent overbaking, which can lead to a rubbery texture.
Step 7: Cool and Serve
Once baked, remove the pie from the oven and let it cool at room temperature for about 30 minutes. This cooling period allows the custard to set further. For an even more intense flavor, consider chilling the pie in the refrigerator before serving, allowing your Crustless Rhubarb Custard Pie to shine at the table either warm or cold.

Crustless Rhubarb Custard Pie Variations
Feel free to get creative with this delightful pie; there are countless ways to personalize it!
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Dairy-Free: Substitute heavy cream with coconut cream for a rich, luscious texture without dairy. This swap still keeps the creaminess intact and adds a hint of tropical flavor.
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Sweetener Swap: Use erythritol or stevia instead of allulose for a different sweetness profile. Both options maintain the low-carb nature while allowing you to adjust to your taste.
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Fruit Fusion: Add low-carb fruits like strawberries or blueberries for a burst of color and extra flavor. This twist makes the pie even more vibrant and enjoyable!
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Zesty Lime: Swap out orange zest for lemon or lime zest to give a refreshing, citrusy kick. The bright acidity enhances the flavor while keeping it interesting.
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Spicy twist: Incorporate spices like cardamom or ginger into the custard for a warm, aromatic complexity. These flavors will meld beautifully with the tangy rhubarb, creating a cozy dessert.
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Nutty Crisp: For added texture, sprinkle in some crushed nuts like almonds or walnuts on top before baking. This addition will add a delightful crunch that pairs perfectly with the smooth custard.
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Mini Servings: Bake individual servings in ramekins to create personal-sized desserts. Not only do they bake faster, but they also look charming and elegant for gatherings!
If you love turning classic flavors into fun new creations, you might also enjoy indulging in some Mini Pecan Pie or a slice of decadent Caramel Cake Sweet. Options abound for satisfying those sweet cravings!
How to Store and Freeze Crustless Rhubarb Custard Pie
Fridge: Store any leftovers in an airtight container in the refrigerator for up to 3 days. Make sure the pie cools completely before covering to prevent excess moisture.
Freezer: For longer storage, you can freeze sections of the Crustless Rhubarb Custard Pie. Wrap each slice tightly in plastic wrap and then place inside a freezer-safe bag for up to 2 months.
Thawing: To enjoy frozen pie, transfer slices to the fridge overnight to thaw, or countertop for a few hours before serving.
Reheating: If desired, reheat individual slices in the oven at 150°C (300°F) for 10-15 minutes until warmed through, preserving that delicious creamy texture.
What to Serve with Keto Crustless Rhubarb Custard Pie
Indulging in this luscious, creamy dessert is just the beginning of your culinary adventure. Complementing it with the right dishes can elevate your dining experience!
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Fresh Berries: Vibrant and juicy, berries like strawberries and blueberries add a delightful burst of sweetness that contrasts nicely with the tangy rhubarb.
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Whipped Cream: A dollop of light, airy whipped cream adds richness and creaminess, creating a decadent pairing that enhances the texture of the pie.
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Keto Ice Cream: A scoop of sugar-free vanilla or coconut ice cream brings a refreshing chill, making every bite of pie indulge in a cool, creamy experience.
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Vanilla Pudding: Serve a small portion of rich vanilla pudding alongside for extra creaminess. The flavors meld beautifully, resulting in a satisfying dessert duo.
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Mint Salad: A light salad with fresh mint and mixed greens brings a refreshing crunch that balances the delicious creaminess of the pie.
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Herbal Tea: A warm cup of herbal tea, like chamomile or mint, soothes the palate while completing the dessert experience in a comforting way.
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Sparkling Water: Refreshing and bubbly, sparkling water with a splash of lemon or lime brightens up the meal, cleansing the palate perfectly between bites.
Make Ahead Options
These Keto Crustless Rhubarb Custard Pies are a fantastic option for meal prep lovers! You can prepare the rhubarb filling up to 24 hours in advance by cooking it until tender and storing it in an airtight container in the refrigerator. Additionally, the custard mixture can be whisked together and refrigerated for 1-2 days ahead of time. Just be sure to keep the custard covered to prevent any absorption of odors. When you’re ready to bake, simply combine the rhubarb and custard in your baking dish, set it in the water bath, and bake as directed. This way, you’ll have a delicious, hassle-free dessert with minimal effort right when you need it!
Expert Tips for Crustless Rhubarb Custard Pie
Check for Doneness: Ensure the custard is set in the center; if it’s still wobbly, continue baking until firm to avoid a runny texture.
Use Ramekins: Baking your pie in individual ramekins can reduce the baking time. Check for doneness after 30-40 minutes for perfectly baked servings.
Avoid Overbaking: Keep a close eye on the pie as it bakes; overbaking can lead to a rubbery texture. Aim for a slight jiggle in the center when it’s ready.
Chill for Flavor: Allowing the pie to chill in the refrigerator enhances the flavors, making every bite a delightful taste experience you won’t want to miss.
Fresh Ingredients: Always opt for fresh rhubarb for the best flavor; it really elevates the taste of your Crustless Rhubarb Custard Pie.

Crustless Rhubarb Custard Pie Recipe FAQs
What kind of rhubarb should I use?
Absolutely! Fresh rhubarb is key for the best results. Look for firm stalks that have a vibrant pink hue, avoiding any that show dark spots or signs of wilting. The fresher the rhubarb, the more vibrant the flavor will be in your Crustless Rhubarb Custard Pie!
How long can I store the pie in the refrigerator?
You can store your leftovers in an airtight container in the fridge for up to 3 days. For optimal taste, let the pie cool completely before covering it—this helps prevent condensation from ruining your creamy custard texture.
Can I freeze the Crustless Rhubarb Custard Pie?
Very! Freezing is a great option for longer storage. To freeze, wrap each slice tightly in plastic wrap and place it in a freezer-safe bag. It can stay delicious for up to 3 months. To enjoy, simply transfer the slices to the refrigerator overnight to thaw, or leave them on the countertop for a few hours.
What should I do if my custard is still jiggly in the center?
No worries! If the custard is jiggly after the initial baking time, simply return it to the oven and bake for another 5 to 10 minutes. Keep an eye on it; you want it to be set but still slightly jiggy in the center. If you’re baking individual ramekins, check for doneness at 30-40 minutes.
Is this pie safe for those with nut allergies?
Absolutely! This Crustless Rhubarb Custard Pie is nut-free, making it safe for those with nut allergies. Just be sure to double-check any substitutions or optional ingredients (like dairy-free alternatives) to ensure they’re also nut-free if you’re serving it to someone with allergies.

Delightful Crustless Rhubarb Custard Pie for Sweet Cravings
Ingredients
Equipment
Method
- Preheat the oven to 180°C (350°F). Gather your ingredients and equipment.
- In a saucepan, cook chopped rhubarb, allulose, and water over medium heat for 5-10 minutes until tender.
- In a mixing bowl, whisk together heavy cream, eggs, remaining allulose, vanilla, melted butter, and orange zest until smooth.
- Transfer cooked rhubarb to the baking dish and pour custard mixture evenly over it.
- Place the baking dish in a larger dish filled with hot water for even baking.
- Bake for 50 minutes, checking for a slight jiggle in the center.
- Remove and cool at room temperature for 30 minutes before serving.
