Cookie cake

Cookie Cake :
This easy, rich, and chewy Chocolate Chip Cookie Cake is the perfect cake to make for your next birthday celebration!
Course Dessert
Cuisine American
Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Servings 8
Author Garnish & Glaze
Ingredients
For the Cookie:
10 tablespoons butter
2/3 cups brown sugar
1/3 cup white sugar
1 egg + 1 egg yolk
1 teaspoon vanilla
1 2/3 cup all-purpose flour
3/4 teaspoon baking soda
3/4 teaspoon salt
1 cup chocolate chips
For the Frosting:
4 tablespoons butter
2 tablespoons cocoa powder
1 1/4 cup powdered sugar
1/2 teaspoon vanilla
1-2 tablespoons milk
Sprinkles

Instructions
For the Cookie:
Preheat oven to 350 degrees F and grease a (8 or 9 inch) pie plate or cake pan.
Cream the butter and sugars together for 2 minutes and then mix in the egg, egg yolk, and vanilla.
Add the dry ingredients and mix until combined. Use a wooden spoon to mix in all but 2 tablespoons of chocolate chips and then press the cookie dough into the pie plate. Sprinkle the remaining 2 tablespoons chocolate chips on top and press them down slightly.
Bake for 22-25 minutes. Let the cookie cool completely and then run a sharp knife along the edge to loosen and then use a large spatula (or two!) to transfer to a platter. Pipe on frosting along the edges and add the sprinkles.
For the Frosting:
Beat all the frosting ingredients together until smooth, adding milk as needed. Place into a piping bag fitted with a 1M tip. Pipe on frosting. Sprinkle on the sprinkles.