The easiest oat flour blueberry muffins are a one-bowl recipe that needs just one gluten free flour to make! Sturdy yet tender and bursting with juicy berries.
Generously butter a muffin tin. Preheat the oven to 375℉.
In a large bowl, whisk together the 2 ½ cups oat flour, 3 teaspoons baking powder,½ teaspoon fine sea salt, and ½ cup granulated sugar. Lightly whisk the 1 large egg separately, then stir in the beaten egg, 1 cup whole milk, and ¼ cup unsalted butter,. Gently fold in the 1 cup blueberries.
Spoon the batter evenly into the muffin tin (fill each cup about two-thirds full). and let the batter rest for up to 20 minutes. Bake the muffins for 15-20 minutes, until a tester comes out clean.
Place the muffin tin on a wire rack to cool for about 10 minutes, then gently turn out the muffins onto the rack to cool completely.
Notes
Rest the batter. Oat flour benefits from a rest before baking off the batter. You can set a timer for 15 minutes, or let the batter rest while the oven preheats to help it hydrate.
Grease the pan well. It's a good idea to generously butter the heck out of the muffin tin to help the muffins release super easily. I've included a photo below to show how much butter I used (yes - it's a bit! But it does help.). See the recipe card for the detailed instructions.
Fill the muffin cups ⅔ full for this recipe. While some muffin recipes advise filling the muffin cups to the brim, I’ve found that about ⅔ full is the sweet spot so that they rise nicely but don’t overflow.
Go dairy-free. Instead of butter, use melted coconut oil plus your favorite non-dairy milk to make these muffins dairy-free.
Refined sugar-free. Add honey to the batter instead of the sugar for a lovely, floral sweetness that's a wonderful complement to the blueberries.