Step 1

Prepare - Heat oven to 400°F. Line muffin trays with 16 parchment or silicone liners.

Step 2

Combine - In a large microwave-safe bowl, melt the coconut oil. Stir in the greek yogurt, maple syrup, applesauce, eggs, and vanilla extract. If coconut oil hardens, pop it back into the microwave and heat in 20-second increments until it melts back in.

Step 3

Mix Dry Ingredinets - Add the flour, baking powder, baking soda, salt, and cinnamon. Mix until just combined. Fold in the rhubarb and walnuts.

Step 4

Bake - Spoon muffin batter into liners until it just pokes over the top of the pan. Sprinkle with coarse sugar.Bake for 20 minutes, or until a toothpick comes out cleanly. Be careful if your muffin tray is near the top of the oven, rotate it to the middle/bottom if possible.