1 cup butter or margarine
1 cup semisweet chocolate chips
1 cup chopped pecans
4 eggs
1 1/2 cups sugar
1 cup all-purpose flour
1 teaspoon vanilla extract

In a saucepan over low heat, melt the butter and chocolate chips, stirring until smooth. Cool. Add pecans; stir until well-coated. In a bowl, combine eggs, sugar, flour and vanilla. Fold in chocolate mixture. Fill paper-lined muffin cups two-thirds full. Bake at 325 degrees F for 35-38 minutes or until a toothpick inserted near the center comes out clean.