Rainbow Bundt Cake

Bahan-bahan (14 porsi)

• 3 cups all purpose flour
• 2 teaspoons baking powder
• 1 teaspoon salt
• 1/2 teaspoon baking soda
• 2 1/4 cups granulated white sugar
• 1 cup (2 sticks) unsalted butter, (at room temperature)
• 1/4 cup vegetable oil
• 4 large eggs, (at room temperature)
• 1 tablespoon vanilla extract
• 1 1/3 cups buttermilk
• red, orange, yellow, green, blue and purple food coloring ((gel paste works best- see notes below))
• 3 cups powdered sugar
• 1 teaspoon finely grated lemon zest
• 4 to 5 tablespoons freshly squeezed lemon juice