Pumpkin Streusel Muffins

Pumpkin Streusel Muffins(from Amy)
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1 package yellow cake mix (you can try different variations with other cake mixes too!)
1 can pumpkin (15 ounces)
1 egg
1/4 cup vegetable oil
1 teaspoon ground cinnamon
1/4 teaspoon ground cloves
1/2 teaspoon ground nutmeg
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Crumb Topping:
1/2 cup packed brown sugar
1/8 cup all-purpose flour
1/2 t ground cinnamon
1 T butter
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Preheat oven to 350 degrees. Mix all the muffin ingredients together and pour into a greased muffin tin. Combine brown sugar, flour, ground cinnamon, and butter to make the topping. Cut the topping together with a fork until it resembles a coarse cornmeal. Sprinkle topping on the top of the muffins before baking. Bake for 20-25 minutes (my muffins took 22 minutes).
**Weight Watchers version contains only the cake mix and pumpkin- no egg and no oil. You could add the spices though!**