Cookies n Cream Smash Cookie has a soft cookies n cream cookie base topped with dark chocolate ganache, vanilla bean frosting, and crushed chocolate sandwich cookies.
Preheat oven to 350° F (177° C) and lightly grease baking sheets.
Measure flour, baking powder, and salt. Whisk together and set aside.
In mixer with paddle attachment, cream butter and shortening on medium-high speed, about 3 minutes or until fluffed together. Scrape sides and bottom of bowl.
Add granulated sugar. Mix on medium-high speed for about 3-5 minutes. Scrape bowl.
Add sour cream and mix for 1 minute on medium speed. Scrape bowl.
Add flour mixture all at once. On low speed, mix just until all the flour disappears.
Add chocolate cookie crumbs all at once. Mix on low speed until incorporated, about 1 minute. Scrape sides and bottom of bowl to be sure everything is mixed.
Using a 2” cookie scoop, place dough on lightly greased baking sheets (8 cookies per pan).
Lightly spray bottom of flat-bottomed glass with cooking spray. Dip in sugar and press cookie flat (to about ½-3/4” tall). Leave a rough edge around the cookie.
Dip in sugar again before pressing each cookie.
Bake at 350° F (177° C) for 11-12 minutes. The cookie tops are barely firm and the edges are not browned. DO NOT overcook!
Allow the cookies to cool in the pan. The cookies will continue to cook slightly.
Dark Chocolate Ganache:
Heat the cream in a microwave safe bowl for one minute. Pour cream into a bowl of semi-sweet chocolate chips. Stir until smooth.
If further melting is needed, heat bowl of chocolate in microwave for 30 seconds more. Stir. Set aside at room temperature.
Vanilla Bean Frosting:
In bowl of stand mixer, cream butter and shortening until light and fluffy, about 2-3 minutes. Scrape bowl.
Add powdered sugar, salt, and vanilla all at once. Mix on low speed until clumps form. Scrape bowl.
Add milk. Mix on low speed until milk is not splashing. Scrape down sides and bottom of bowl. Then, mix on medium-high speed until fluffy and light, about 2-3 minutes. Set aside.
Assemble Cookie:
When cookies are completely cool, spread 1-2 teaspoons of Dark Chocolate Ganache on tops of cookie (leaving the thin, rough edge around cookie without frosting). Use a disposable decorating bag to easily squeeze ganache on the cookie. Let ganache set completely, use fridge to set faster.
Spread a generous tablespoon of vanilla bean frosting on top of the ganache (leaving a slight edge of ganache showing).
Immediately sprinkle with coarsely crushed chocolate sandwich cookies.
Drizzle with leftover ganache. Let set. (or eat immediately!)