Banana, Lemon, Raspberry muffins

• 2 cups all-purpose flour
• 3/4 cup sugar
• 2 tsp baking powder
• 1/2 tsp baking soda
• 1/2 tsp salt
• 4 large ripe or overripe bananas, mashed
• 1/4 cup skim milk
• 1 large egg
• 1 tsp pure vanilla extract
• 2 tbsp lemon juice
• 2 tsp cinnamon
  
• 1 cup fresh or frozen raspberries

Mix all the ingredients together, folding in the raspberries at the end. Bake at 350 for 25-30 minutes.