For an even thicker smoothie, freeze the almond milk in ice cube trays and use frozen almond milk cubes in place of regular almond milk. Adjust the amount of almond milk to achieve your desired consistency. Add more for a thinner smoothie, less for a thicker one. Feel free to experiment with different types of berries or protein powders to customize the flavor profile to your liking. A handful of spinach can also be added for an extra boost of nutrients without significantly altering the taste. For a more intense chocolate flavor, add a teaspoon of unsweetened cocoa powder to the blender.