Easy Red White and Blue Marble Cake Recipe - Perfect for July 4th - Savoury Flavor

Ingredients

• 2 cups white granulated sugar
• 1/2 cup neutral vegetable oil
• 3 fresh large eggs, room temperature
• 1 tablespoon pure vanilla extract
• 1/2 cup light sour cream
• 2 1/2 cups all-purpose flour
• 3 teaspoons baking powder
• 1 teaspoon fine salt
• 1 1/4 cups whole milk
• Red gel food coloring (about 8 drops)
• Blue gel food coloring (about 8 drops)
• 2 cups cold unsalted butter, cubed
• 7-8 cups confectioners' sugar
• 2 teaspoons vanilla extract
• 2-3 tablespoons heavy cream
• Pinch of salt
• Red, white, and blue sprinkles
• Fresh berries (optional)