These Birthday Cake Cookies are huge frosted cookies with all the flavors of cake batter but in cookie form. Soft sprinkled cookies with a creamy frosting are as decadent as a piece of cake, and a delight to eat as a cookie!
In a stand mixer fitted with paddle attachment or in a large mixing bowl with hand mixer, cream together the softened butter and white sugar until light and fluffy. This takes about 2-3 minutes.
Add the eggs one at a time, beating well after each egg.
Fold in the sprinkles or mix in on low speed just until incorporated.
Using a ⅓ cup or large cookie scoop, make 12 cookies and place 6 on each parchment lined baking sheet. Roll the cookie dough into smooth balls and flatten slightly with the palm of your hand so they look like thick hockey pucks.
Bake cookies one pan at a time on center rack for 15-17 minutes until edges are barely golden brown and the centers no longer look wet and glossy.
Let cookies cool on pan for 5 minutes then transfer to a wire rack to cool completely.
While the cookies are cooling make the buttercream frosting.
Birthday Cake Buttercream Frosting
In a stand mixer with the paddle attachment or whisk attachment, cream softened butter until smooth.
Add the powdered sugar, one cup at a time, mixing until fully incorporated after each cup.
Mix in the vanilla extract and almond extract until incorporated.
Now add the milk, one tablespoon at a time, until you've reached your desired consistency.
Add the frosting to a piping bag or gallon zip top bag, cut off the tip or corner or use a piping tip of your liking, and pipe the frosting on the cookies in any pattern you'd like.
Add any sprinkles or decorations immediately after you've frosted each cookie. You want to do it right away so the sprinkles will adhere to the frosting and not fall off.