Moist Vanilla Sheet Cake with Buttercream

Ingredients

• 2 1/2 cups all-purpose flour
• 2 1/2 teaspoons baking powder
• 1/2 teaspoon salt
• 1 cup unsalted butter, softened
• 1 3/4 cups granulated sugar
• 4 large eggs, room temperature
• 1 tablespoon vanilla extract
• 1 cup whole milk, room temperature
• 4 cups powdered sugar, sifted
• 1/4 cup whole milk
• 2 teaspoons vanilla extract
• Pinch of salt
• Food coloring for school colors
• Food coloring for piping Class of 2026
• Sprinkles or edible decorations, optional