To start, we need buttermilk. You can buy in the store or make your own. To do this, take a glass of warm milk, add a tablespoon of lemon juice or vinegar and leave for an hour. Our buttermilk is ready.

Take the paste. Mix the flour, baking powder, soda, salt and brown sugar. Add to the center of the buttermilk, egg, olive oil and mashed or grated on a coarse grater bananas. Now a quick little mix, and kneaded the dough, but try not to knead, a minimum of effort and time.

Wash the blueberries and add it into the batter, gently mix. At the time of preparation of this recipe of blueberry was not, so I used blueberries.

Fill the test molds. Here... you Can use silicone. If not, iron is better to insert paper cuff. Fill molds almost to top and sprinkle brown sugar of Demerara.

Bake our muffins should be 20-25 minutes in a preheated oven at 180 degrees. They should rise and browned. Check the readiness with a toothpick. But over time, focus on your oven, it took me 30 minutes.