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Homemade rhubarb oat muffins with fresh rhubarb on a wooden table.

Rhubarb Oat Muffins

These Rhubarb Oat Muffins combine the tartness of rhubarb with the heartiness of oats, topped with a delightful crumble for a satisfying crunch. Perfect for breakfast or an afternoon snack.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Course Breakfast, Snack
Cuisine American
Servings 12 muffins
Calories 200 kcal

Ingredients
  

For the Muffins

  • 2 cups 2 cups rhubarb, chopped Provides tartness; reserve 1/4 cup for topping
  • 1 cup 1 cup whole milk Provides moisture
  • 1 tsp 1 tsp white vinegar or lemon juice Activates baking soda
  • 1 tsp 1 tsp vanilla extract Adds warmth
  • ½ cup ½ cup vegetable oil or canola For moisture
  • 1 large 1 egg, lightly beaten Binds ingredients together
  • cups 2½ cups unbleached all-purpose flour For structure
  • cups 1¼ cups dark brown sugar Sweetens and adds moisture
  • 1 tsp 1 tsp baking soda Leavening agent
  • 1 tsp 1 tsp salt Balances sweetness
  • 1 tsp 1 tsp cinnamon Enhances flavor
  • 1 cup 1 cup old-fashioned oats Contributes chewiness

For the Crumble Topping

  • ¼ cup ¼ cup unsalted butter, chilled and cut into 1/4" pieces Adds richness
  • ¼ cup ¼ cup unbleached all-purpose flour For the crumble topping
  • ¼ cup ¼ cup old-fashioned oats For texture and heartiness
  • 2 tbsp 2 tbsp brown sugar Sweetener with depth
  • 1 tsp 1 tsp ground cinnamon For warmth
  • 1 tsp 1 tsp turbinado sugar Optional; adds a caramel-like crunch

Instructions
 

Preparation

  • Preheat your oven to 350°F and prepare two standard muffin pans by lining them with cupcake liners or spraying them with non-stick cooking spray.
  • In a small bowl, combine the crumble ingredients: chilled butter, unbleached all-purpose flour, oats, brown sugar, and ground cinnamon. Use two forks to work the butter into the mix, creating a texture that resembles coarse crumbs. Refrigerate if necessary.

Making the Muffins

  • In a large mixing bowl, whisk together the flour, brown sugar, oats, baking soda, salt, and cinnamon.
  • In a medium bowl, whisk together the milk, white vinegar or lemon juice, vanilla extract, vegetable oil, and the beaten egg.
  • Pour the wet ingredients into the bowl with the dry ingredients and mix until just combined. Gently fold in 1¾ cups of chopped rhubarb.
  • Fill muffin cups about 1/2 to 3/4 full with the batter. Top with remaining rhubarb and the crumble mixture.

Baking

  • Bake in the preheated oven for 20 to 25 minutes, rotating the pans halfway through. They're done when a toothpick comes out clean.
  • Let cool in the pan for about 10 minutes before transferring to a wire rack.

Notes

Ensure butter is cold for crumble. Don’t over-mix batter. Store muffins in an airtight container to keep them moist.
Keyword Baking, breakfast recipes, Oat Muffins, Rhubarb Muffins, Snack Recipes