🥛 This cookie tastes exactly like sipping a thick cookies & cream milkshake! Crumbl loaded it with crushed Mini Oreos and swirled in creamy vanilla frosting that mimics that classic milkshake texture. The cookie base stays soft and dense, while the Oreo crunch adds perfect contrast. You've had Oreo-stuffed cookies before, but this milkshake presentation feels nostalgic and indulgent.
Preheat oven to 350°F (175°C) and line two large baking sheets with parchment. Cream 1 cup unsalted butter, 2 oz cream cheese, granulated sugar, and brown sugar together on medium-high for 2-3 minutes until light and fluffy. This creaming step builds the signature Crumbl thick, soft dough texture.
Add eggs and 2 tsp vanilla extract to the creamed mixture; beat until fully combined, scraping bowl as needed.
Sift together flour, cornstarch, baking powder, baking soda, and kosher salt. With mixer on low, mix the dry ingredients into the wet until just combined (do not overmix). Fold in 1 cup crushed Mini Oreos, reserving remaining 0.5 cup for coating.
Portion dough into 8 equal balls (about 1/2 cup or 4.75 oz each). Roll each gently in the reserved 0.5 cup crushed Mini Oreos. Place cookies well spaced on sheets. Cover and chill dough balls for at least 45 minutes before baking—this prevents overspreading and keeps cookies thick like Crumbl.
Bake cookies for 14–16 minutes until edges are set but centers are still soft and look slightly underbaked. Cool completely on baking sheets to finish setting and keep the plush Crumbl-style interior.
While cookies cool, beat 0.5 cup softened butter for frosting until creamy. Mix in 2 cups powdered sugar, then add 2 tbsp heavy cream and 1 tsp vanilla extract. Beat 2-3 minutes until the frosting is light and spreadable, resembling a melty milkshake.
Once cookies are fully cool, pipe or spoon swirls of frosting generously over each, leaving a rim for the classic Crumbl look. Top each cookie with the remaining whole Mini Oreo for garnish. Chill cookies 10 minutes to set the frosting for that craveable Crumbl finish.