First, preheat your oven to 400F. Then, in a large bowl, mix together all of the dry ingredients until combined. Set aside.
1 ¾ cups oat flour, ⅓ cup unflavored collagen peptides, 1 tbsp arrowroot starch, 1 ¼ tsp baking powder, ½ tsp baking soda, ¼ tsp kosher salt
In another large bowl, add the cane sugar & lemon zest and use your hands to massage the zest into the sugar. This releases the oils in the zest to help bring out the lemon flavor, so don't skip it!
½ cup cane sugar, zest from 1 large lemon
To the bowl with the sugar, add the remaining wet ingredients & whisk until combined and mostly smooth. Then, pour the wet ingredients into the dry ingredients and switch over to a spatula to stir until a batter has formed.
2 large eggs, ¾ cup full-fat plain greek yogurt, ¼ cup avocado oil, 2 tbsp lemon juice, 1 tsp vanilla bean paste
Let the batter sit at room temperature for 10 minutes, to allow the oat flour to hydrate & leavening agents to activate. Meanwhile, add liners to your muffin tin and toss frozen wild blueberries in arrowroot starch to coat.
1 cup frozen wild blueberries, 2 tsp arrowroot starch
Once the batter has rested, gently fold in the blueberries coated in starch. Then, gently scoop out the batter and divide it between 10 muffin cavities. Top each with a few more frozen wild blueberries. Transfer to the oven to bake for 6 minutes, then reduce the heat to 350F and continue baking for another ~17 minutes, or until a toothpick comes out clean. Allow the muffins to cool down before enjoying.