1 med. lemon, scrubbed
1/2 c. unsalted butter
1 c. plus 4 tsp. sugar
2 eggs
1 tsp. baking soda
2 c. flour
1 c. plain yogurt
3/4 c. (5 oz.) chocolate chips
1/4 c. lemon juice

Grate lemon peel. Beat butter and 1 cup sugar. Add eggs. Stir in soda and grated peel. Fold in half of the flour, then half of the yogurt. Repeat. Fold in chocolate chips. Fill muffin cups. Bake at 375 degrees for 20-25 minutes. Remove from oven. Brush lemon juice over hot muffins. Sprinkle with sugar.