Mix together butter, brown sugar and egg with mixer. Add sweet potatoes and vanilla extract, continue mixing. Whisk together the flour, baking soda, ground cinnamon and nutmeg in a bowl and add to creamed mixture along with buttermilk. Fold in nuts.
Melt about 2 tablespoons butter or use 2 tablespoons of oil and cook pancakes 2 to 3 minutes on each side on hot griddle or in skillet. Makes about 10 pancakes.
Notes
I cook a medium sized sweet potato in the microwave peel and mash to use in this recipe. You could use canned sweet potatoes, too.