In a large mixing bowl, add flour, protein powder, sugar, baking powder, salt, and cinnamon. Whisk until evenly combined. Next, add in plant-based milk, water, apple cider vinegar, and vanilla. Whisk until the batter is smooth and a little thick.
Warm the waffle iron and grease the plates with a spry cooking oil or with a pastry brush dipped in avocado oil.
When warm, fill each waffle iron with about ½ cup of batter. Note the quantity of batter needed will depend on the size of the waffle iron; this is what my iron requires.
Close the lid of the waffle maker and cook for 3 to 4 minutes or until the waffle iron says they are done. Some waffle irons can regulate the cooking time. The waffles are ready to remove from the iron when they have a lovely golden-brown color and are crispy on the edges.
Serve with fruit, dust of powdered sugar, peanut butter, or maple syrup! The options are limitless!
Storage Instructions: Store any leftover waffles in an airtight container in the refrigerator for up to 3 days. For longer storage, freeze them in a single layer for 2 hours before transferring to a freezer bag for up to 2 months.
Reheating Instructions: The best way to reheat these waffles is in a toaster or toaster oven at 350℉ for 3 to 5 minutes until they regain their signature crispiness. Avoid the microwave, as it will make the waffles soft and lose that satisfying crunch.