My kids won't eat many cooked orange vegetables, so this is a sneaky way I get it into them. I put the sweet potato puree into pancake mix as well. For each cup of pancake mix I use, I stir in about 1/2 cup pureed sweet potatoes and add 1/2 t. cinnamon.
2 c. buttermilk or milk+2T white vinegar
1 c. whole wheat flour
1 c. white flour
2 t baking powder
1 t baking soda
1/2 t salt
1 t cinnamon, optional
1/3 c. butter, melted
1 c. sweet potato puree, optional
Heat waffle iron. Beat the eggs, and then add buttermilk, flours, baking powder, baking soda, salt, cinnamon, and melted butter and beat until smooth. Stir in sweet potato puree. This makes about 5 cups of batter, which on my small waffle iron makes about 16 waffles. I freeze them and then toast them in the toaster for my kids. Top with fresh fruit and it makes a pretty good breakfast. You can also vary the proportions of the whole wheat/white flour to get the taste you prefer. I love that this recipe contains no sugar, yet the sweet potato adds a bit of sweetness.
To make sweet potato puree, roast whole sweet potatoes at 400 degrees for 50-60 minutes. Scoop out the flesh and puree in a food processor or blender. Add water if necessary to get a smooth puree. Freeze in 1/2 cup portions and defrost in hot water for a few minutes before mixing into batter.