Preheat your oven to 350°F (175°C) and line an 8x8-inch baking pan with parchment paper.
In a large bowl, sift together well all dry ingredients except for the rolled oats. This includes 1 cup oat flour, 1/4 cup almond flour, 1/2 teaspoon baking powder, 1/2 teaspoon ground cinnamon, and 1/4 teaspoon sea salt.
Mix the rolled oats into the sifted dry ingredients.
In a separate bowl, whisk together the wet ingredients. This includes 1/2 cup all-natural peanut butter, 1/4 cup maple syrup, 1/4 cup honey, 1/4 cup almond milk, and 1 teaspoon vanilla extract.
Add the dry ingredients into the wet mixture and stir until everything is evenly combined.
In a separate bowl, gently toss 1 cup frozen blueberries and chopped dried cherries (if using) with 1 tablespoon oat flour until they are lightly coated. Add the coated berries to the batter and fold them in until evenly distributed.
Press the mixture into the prepared baking pan, spreading it evenly.
Bake for 25-30 minutes or until the edges are golden brown and a toothpick inserted into the center comes out clean.
Allow the bars to cool completely before cutting into squares.