1/4 cup butter or margarine, cut up
1 cup packed brown sugar
1 large egg
1 1/4 cups milk
1 tsp. vanilla
2 cups whole-wheat flour
1 tsp. baking powder
1/4 tsp. salt
3/4 cup chopped walnuts or other nuts
1 Tbsp. sugar
Optional variation: Add 3/4 cup peeled, chopped apple
Preheat oven to 425. In a large bowl, using an electric mixer, beat butter and sugar until well mixed. Add egg, milk, and vanilla and blend. Add flour, baking powder, salt and nuts and mix until moistened.
Spoon batter into paper-lined muffin tins, filling them about three-fourths full. Sprinkle with sugar. Bake until a toothpick inserted in the center comes out clean, about 15 minutes. Remove from pan and cool on a rack for 5 minutes. Serve warm.