This celebratory cookie cake is perfect for Valentine's Day. Packed with M&M's and frosted with vanilla buttercream, this giant cookie is sure to bring joy!
Preheat the oven to 350° F. Lightly grease a 9-inch cake pan, set aside.
In the bowl of a standing mixer, cream the butter and sugars until fluffy, about 2 minutes. Add the eggs and vanilla, mixing until incorporated.
Add the dry ingredients and mix until everything is combined. Stir in ¾ of the M&M candies.
Press the dough into the prepared pan. Press the remaining M&M candies into the top of the cookie cake.
Bake for 20-25 minutes, until lightly golden and set. Let the cookie cool completely before gently removing it from the pan.
For the Frosting:
In the bowl of a standing mixer, cream the butter. Add the confectioners' sugar, vanilla extract, and milk/water, beating until smooth. (Add an additional tablespoon of liquid if needed.)
Pipe the frosting along the edge of the cookie cake and garnish with sprinkles. (I used a 1M star tip.)