A tasty combination of whole wheat, rolled oats and rhubarb. Whole Wheat Rhubarb Oatmeal Muffins Recipe Type: Breakfast Author: Joan Donogh Ingredients 1 egg 1 cup buttermilk 1/2 cup canola oil, or melted butter 2 1/2 cups whole wheat flour 1 cup rolled oats 1 tsp cinnamon 2 teaspoons baking powder 1 teaspoon baking soda