📖 Instructions

1. Preheat your oven to 350°F (175°C). Line a large baking sheet (at least 12x17 inches) with parchment paper. This ensures the cookie cake doesn’t stick and makes cleanup a breeze.
2. In a large bowl, cream together 1 cup (2 sticks) of softened unsalted butter and 1 cup of granulated sugar until light and fluffy. Don't skimp on the creaming – this step is key to a tender cookie!
3. Beat in 2 large eggs one at a time, then stir in 1 teaspoon of vanilla extract. Make sure your eggs are at room temperature for the best incorporation.
4. In a separate bowl, whisk together 3 cups of all-purpose flour, 1 teaspoon of baking soda, and 1/2 teaspoon of salt. This ensures even distribution of the leavening agent.
5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix – overmixing develops gluten and results in a tough cookie.
6. Stir in 1 cup of chocolate chips (or your favorite mix-ins like sprinkles or chopped nuts).
7. Gently press the dough evenly onto the prepared baking sheet, leaving about 1/2 inch of space around the edges. Use your hands or a spatula to create a smooth, even surface.
8. Bake for 15-20 minutes, or until the edges are golden brown and the center is set. Keep a close eye on it – oven temperatures vary, and you don't want to burn the bottom!
9. Let the cookie cake cool completely on the baking sheet before frosting. Cooling completely prevents the frosting from melting.
10. While the cookie is cooling, prepare the frosting. In a large bowl, beat together 1 cup (2 sticks) of softened unsalted butter and 4 cups of powdered sugar until smooth and creamy.
11. Stir in 2 tablespoons of milk and 1 teaspoon of vanilla extract. Add more milk, 1 tablespoon at a time, until you reach your desired consistency.
12. Divide the frosting into separate bowls and tint each bowl with food coloring according to your school colors or desired decorations. I found gel food coloring provides the most vibrant colors.
13. Once the cookie cake is completely cool, frost it with the tinted frosting. Use a piping bag with a star tip to create decorative borders or write a congratulatory message. If you dont have a piping bag, a ziplock bag with the corner snipped off works great!
14. Decorate with graduation-themed sprinkles, edible glitter, or homemade fondant decorations. Get creative and personalize it to the graduate's interests!
15. Slice and serve! Watch the smiles as everyone enjoys a piece of this celebratory treat.