Preheat your oven to 375°F (190°C) and prepare a cookie sheet by greasing or lining it.

In a large bowl, combine softened unsalted butter with brown sugar and granulated sugar. Beat until fluffy and pale, about 3-5 minutes.

Add one room-temperature egg and pure vanilla extract. Mix until fully incorporated and smooth.

Sift together all-purpose flour, baking soda, and salt in a separate bowl.

Gradually mix the dry ingredients into the wet ingredients, stirring gently until just combined.

Fold in the white chocolate chips, chopped pistachios, and dried cranberries (or cherries).

Portion out heaping tablespoonfuls of dough onto the cookie sheet, leaving about 2 inches of space in between.

Bake for 8-10 minutes until edges are light golden brown and centers are soft but set.

Remove from the oven and cool for about 2 minutes before transferring to a wire rack.