Festive Christmas Tree Sheet Cake for Holiday Parties - My Home Made Recipe

Ingredients

• Nonstick baking spray or softened butter, for the pan
• 2 3/4 cups (345 g) all-purpose flour
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon kosher salt
• 2 cups (400 g) granulated sugar
• 3 large eggs, room temperature
• 1 cup (240 ml) vegetable oil
• 2 teaspoons vanilla extract
• 1 cup (240 ml) buttermilk, room temperature
• 1/2 cup (80 g) red, green, and white holiday sprinkles, preferably jimmies
• 1 1/2 cups (340 g) unsalted butter, softened
• 6 cups (720 g) powdered sugar, sifted if lumpy
• 1/4 cup (60 ml) whole milk or heavy cream, plus more as needed
• 1/4 teaspoon kosher salt
• Green gel food coloring
• 1 tablespoon unsweetened cocoa powder or brown gel color, optional for the trunk frosting
• 1/2 cup (90 g) mini red, yellow, green, and white candy-coated chocolates
• 2 tablespoons holiday sprinkles or sanding sugar
• 1 red sour candy belt, cut into a bow or star shape
• 5 brown candy-coated chocolates, for the trunk