Grease and preheat the waffle iron according to manufacturer instructions.
Place all ingredients into the blender in the order listed and blend until smooth and incorporated.
Ladle 1/3 cup of mixture unto each waffle iron mold and cook until golden on both sides.
Serve with toasted walnuts and maple syrup if desired.
You can use gluten-free oats, old fashioned regular oats, or quick cooking oats for these sweet potato waffles. Do NOT use steel-cut oats.
Instead of sweet potato puree, you can use leftover sweet potato casserole or canned pumpkin puree and these would become Gluten-Free Pumpkin Waffles, instead of Gluten-Free Sweet Potato Waffles
Any variety milk works well in this easy waffle recipe. Use coconut milk or almond milk to keep these dairy-free sweet potato waffles.
If you don't want these waffles to be gluten-free, use 2 cups all purpose flour in place of oats. Whisk the dry ingredients together and mix the wet ingredients together separately and then mix together.