Kristyn's Pumpkin Muffins

Mix 1 1/2 cups oil with 2 2/3 cup sugar
Add 4 eggs
3 1/3 cups flour
2 tsp. baking soda
1/2 tsp. baking powder
1 1/2 tsp. salt
2 tsp. cinnamon
2 cups pumpkin (one small can)
12 oz. chocolate chips

Bake at 350 degrees in a muffin tin for 25 to 30 minutes.

Frosting:
1 box powdered sugar
1 tsp. vanilla
8 oz. pkg. cream cheese
1/2-cup butter