My method for making these muffins with just one bowl is mixing the wet ingredients together first. Then, add the dry ingredients on top. I add the flour first, and then sprinkle on the baking powder, soda, salt, and spices. Before stirring everything together, I gently mix just the top layer to incorporate the leavening and spices into the flour. Once that’s done, I stir everything together until just combined.
Don't overmix the muffin batter. Once everything is combined, stop stirring. Overmixed muffins can become tough after they are baked.
When measuring your flour, use the fluff and scoop method. This helps prevent over compacted flour, which can make your muffins dry.