Preheat your oven to 400°F (200°C).
Grease a 12-cup muffin tin with butter or line with paper liners. 2.
In a large bowl, whisk together the whole wheat flour, cornmeal, rye flour, baking powder, and salt until well combined.
Stir in the rolled oats. 3.
In a separate medium bowl, whisk the milk, egg, vegetable oil, and honey together until smooth. 4.
Pour the wet into the dry . Gently fold the mixtures together with a spatula until just combined. Be careful not to overmix; a few lumps in the batter are perfectly fine. 5. Evenly divide the batter among the 12 prepared muffin cups, filling each about two-thirds full. 6.
Bake for 18-20 minutes, or until a wooden skewer inserted into the center of a muffin comes out clean. 7.
Let the muffins cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.
Serve warm for the best experience!
Do not overmix the batter.
Mix only until the flour streaks disappear. Overmixing develops gluten and results in tough, dense muffins instead of light and tender ones.