Crumb Cake Muffin Tops Recipe

Name: Crumb Cake Muffin Tops Recipe
Ingredients: 1/2 cup (3 1/2 ounces) granulated sugar; 1/2 teaspoon salt; 2 tablespoons melted butter; 1 tablespoon canola oil; 1 large egg; 1/2 cup milk; 1/4 cup sour cream; 2 teaspoons vanilla extract; 1 cup (5 ounces) all-purpose flour; 1 1/2 teaspoons baking powder; 1/8 teaspoon baking soda; 1 3/4 cup (8 3/4 ounces) all-purpose flour; 2/3 cup (4 2/3 ounces) packed light brown sugar; 1 teaspoon cinnamon; 1/4 teaspoon salt; 10 tablespoons (5 ounces) unsalted butter, melted