Combine all the ingredients except the nuts in a bowl. Beat on low for 1 minute. Turn mixer to medium, beat for 2 minutes. Fold in nuts. Fill lined cupcake pans 1/2 full. Bake in a 350 degree oven for 20 minutes or until a toothpick inserted into the center of the cupcakes comes out clean. Cool.

Inject and Frost with Pumpkin Cream Cheese Frosting
4 ounces cream cheese, softened
1/4 cup butter, softened
2 cups confectioners' sugar
1/2 teaspoon vanilla
1/2 teaspoon cinnamon
1/4 cup canned pumpkin
1 Tablespoon milk

Beat all the ingredients until smooth. Fill 2 bellows with the filling. Inject into the center of each cupcake. Frost the cupcakes with remaining frosting. Garnish with additional chopped nuts.