To make your own protein shake, combine a protein powder with a liquid of choice. You can turn it into a smoothie by adding in ingredients such as fruits, produce, and healthy fats. Try this homemade chocolate berry protein shake: 1 scoop of chocolate Vega protein powder, 1 cup non-dairy milk, ¼ cup frozen blueberries, ¼ cup frozen raspberries, 1 cup fresh spinach, 1 Tbsp almond butter, 1 small banana, 1 cup ice.