Mix ground flaxseed with a tablespoon of dairy-free milk 5 minutes before adding to batter to activate its binding properties and enhance nutrient absorption.

Toss blueberries in a light coating of gluten-free flour and fold them in at the very end to prevent sinking and achieve even distribution throughout the muffins.

Use room temperature eggs to create a smoother batter that incorporates better with the avocado oil, resulting in more tender, evenly-textured muffins.

Mix ingredients until just combined—overmixing develops gluten even in gluten-free flour, leading to dense, tough muffins instead of light and fluffy ones.

Briefly warm the cinnamon and nutmeg in a dry pan before adding to boost their aromatic oils and deepen their flavor complexity in the final baked product.