This smoothie is a much-needed pack of nutritional punch and helps you to build lean muscles. The peanut butter is a source of healthy fats which would provide you with energy and power. You just need to add 1 cup unsweetened almond milk, 2 tablespoons natural peanut butter, 1 frozen banana, 1 scoop chocolate protein powder and 1 cup ice in a blender, and blend until smooth.