Cinnamon Apple Buckle - Crystal Sugar

Ingredients

• 1 1/2 cups all-purpose flour*, sifted
• 1/2 cup Crystal Sugar Extra Fine Granulated Sugar
• 2 teaspoons baking powder
• 1 teaspoon cinnamon
• 1/4 teaspoon salt
• 1 large egg
• 2 teaspoons vanilla extract
• 3/4 cup whole milk
• 4 tablespoons vegetable oil
• 1 (21 oz) can apple pie filling
• 1/2 cup old-fashioned oats
• 1 tablespoon flour
• 1/4 cup Crystal Sugar Light Brown Sugar
• 1/2 teaspoon ground cinnamon
• 2 tablespoons butter, softened