In a small bowl, mix the chia seeds with water to create “chia eggs” and let sit for at least 10 minutes.
Preheat oven to 375°F (190°C).
In a large bowl, mash the bananas and mix in melted coconut oil, lemon juice, and chia eggs.
Add the flour, oats, protein powder, baking powder, and salt. Stir well until fully combined.
Gently fold in the raspberries.
Scoop about 2 tablespoons of batter into a greased muffin tin for each muffin.
Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
Allow to cool completely before removing from the tin.