If you’re looking for a fun, crowd-pleasing dessert for a celebration, this Confetti Sheet Cake is hard to beat. It’s soft, colorful, and topped with a thick layer of creamy frosting and sprinkles, perfect for graduation parties and any moment worth celebrating!
Heat oven to 350°F. Grease a 13x9-inch pan with cooking spray.
In a large bowl, whisk cake mix, milk, oil, and eggs for about 1 minute until smooth. Pour batter into pan; spread evenly.
Bake 25 to 30 minutes or until a toothpick inserted in the center comes out clean. Remove cake from oven to a cooling rack. Cool completely, about 1 hour.
Spread 1 tub of frosting in a thick layer over the top of the cooled cake.
Fit one decorating bag with a large star piping tip (such as 847, 1M, or 4D) and one decorating bag with a small star piping tip (such as 32). Divide the second tub of frosting between the two decorating bags. Pipe a boarder around the outside of the cake with the large star tip. Pipe a second boarder just inside the first boarder with the small star piping tip. Sprinkle boarders with rainbow sprinkles.
To serve, cut the cake into squares.
