1. Heat oven to 400°F. Grease small muffin cups (1-3/4 inches in diameter).
2. Stir together baking mix, sugar, butter and egg in medium bowl; with fork, beat vigorously 30 seconds. Stir in banana and peanut butter chips. Fill muffin cups 2/3 full with batter.
3. Bake 12 to 15 minutes or until golden brown. Meanwhile, prepare QUICK GLAZE. Remove from pan immediately; dip tops of warm muffins into glaze. Serve warm. About 4 dozen small muffins.
QUICK GLAZE: Stir together 1-1/2 cups powdered sugar and 2 tablespoons water in small bowl until smooth. Add additional water, 1/2 teaspoon at a time, for thinner consistency.