In a large bowl, mix together the smooth peanut butter, Greek yogurt, and agave nectar or honey until well combined and creamy.
Use a spatula to ensure all ingredients are fully incorporated, creating a luscious blend.
Taste the mixture and adjust the sweetness by adding more agave nectar or honey if desired.
Spoon the mixture into silicone molds or an ice cube tray, pressing down gently to fill each cavity evenly.
Place the molds in the freezer and let them chill for a minimum of 4 hours, or until completely firm.
Once frozen, pop the bites out of the molds and let them sit at room temperature for a few minutes before enjoying.