Protein Packed Blueberry Muffins are the perfect, protein-packed, on-the-go breakfast or afternoon snack. These delicious Paleo-friendly muffins are overflowing with blueberries and have a subtle buttery, lemon flavor. These grain free muffins have 11 simple ingredients. Lots of blueberries and fresh lemon juice are the stars. They come together beautifully with a grain free batter made with my favorite grain free flour and my favorite grass-fed collagen.