Preheat oven to 180°C (350°F). Line a muffin tin or lightly grease it.
Mix dry ingredients: In a bowl, whisk flour, baking powder, baking soda, salt, and cinnamon.
Mix wet ingredients: In another bowl, whisk honey, oil, eggs, Greek yogurt, and vanilla until smooth.
Combine: Gently fold dry ingredients into wet ingredients—don't overmix.
Add blueberries: Fold in blueberries lightly.
Bake: Divide batter evenly into muffin cups. Bake 18–22 minutes, until a toothpick comes out clean.
Cool: Let rest 5 minutes, then transfer to a rack.
