The Apple Farm Apple Muffins

1 1/2 cup flour
1/2 cup sugar
2 teaspoons baking powder
1 teaspoon cinnamon
1/4 teaspoon allspice
1/4 teaspoon baking soda
1/4 teaspoon salt
2 eggs
1 cup sour cream
1/4 cup melted butter
1 cup diced, unpeeled, tart apples

Mix dry ingredients in large bowl. Mix eggs, sour cream and butter, then add to dry ingredients. Stir in diced apples. Top each muffin with this topping crumble:
1/4 cup flour
3 tablespoons sugar
2 tablespoons butter
1/4 teaspoon cinnamon
Bake 20-25 minutes at 375 degrees in greased muffin pan. Makes 18 muffins.