Cinnamon Blueberry Muffins

Why This Cinnamon Blueberry Muffins Works

In the bowl, the dry and wet parts stay separate at first. Once the buttermilk mixture goes into the flour mixture, the baking powder and baking soda start reacting right away. Tiny bubbles form in the batter, but because the batter is fairly thick and not overmixed, those bubbles stay trapped. In the oven, those bubbles grow and push the batter up, so the muffins rise instead of sinking or turning dense.

As the heat moves through the batter, the egg sets and the flour firms up, so the muffins hold their shape around the blueberries. The mix of melted butter and oil keeps the crumb soft instead of dry, even after the muffins cool. While they bake, the blueberries soften and burst a little, sending juice into the batter around them without flooding the whole muffin. On top, the turbinado sugar melts just enough to stick, then hardens again as it cools, so the tops stay crunchy while the inside stays tender and moist.

Mistakes To Avoid

Overbaking the muffins can dry them out fast. Once they stay in the oven too long, the edges turn tough and the crumb goes from soft to crumbly and hard, and the sugar on top can go from crunchy to almost burnt.

Overmixing the batter after the wet and dry ingredients are combined makes the muffins dense. Too much stirring builds up the gluten in the flour, so instead of a light, tender crumb, the muffins bake up heavy with tight, chewy insides.

Adding frozen or very wet blueberries straight in without patting them dry can cause streaky, soggy muffins. The extra moisture leaks into the batter as they bake, so the centers can stay gummy and the muffins may not rise evenly.

Skipping the paper liners or not greasing the pan enough often leads to muffins sticking to the tin. When that happens, the bottoms tear off as they are pulled out, leaving broken muffins and a lot of crumb left behind in the pan.