Thanksgiving Texas Sheet Cake | Cooking Professionally

Ingredients

• ***For the cake:***
• 1 1/2 cups unsalted butter, softened, plus more, to taste, for greasing the pan
• 3 cups all-purpose flour, plus more, to taste, for dusting the pan
• 1 1/2 tablespoons pumpkin pie spice, plus more, to taste, for garnish
• 1 1/2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 1 1/2 teaspoons salt
• 1 1/2 cups granulated sugar
• 1 1/2 cups light brown sugar
• 6 eggs, room temperature
• 28 ounces canned pumpkin purée
• ***For the frosting:***
• 1 cup unsalted butter, softened
• 1/2 cup whole buttermilk
• 1 teaspoon vanilla extract
• 1/2 teaspoon salt
• 5 cups powdered sugar, plus more, to taste