Break the egg into a bowl, add the sugar, and mix well. Add the yogurt, then the milk, and stir well with each addition.
Sift in the flour and baking powder. Use a rubber spatula to stir until well blended.
Pour the batter into the muffin cups (if necessary, grease the cups with butter), and bake for about 20 minutes at 180℃.
I added blueberries. They were sweet and tart and delicious.
Story Behind this Recipe
I have made various muffins, but this is always the basic recipe. Since it's a basic recipe, it is light and slightly sweet. Top with your choice of topping for different flavors.
Since the baking time will vary depending on the oven, poke the muffins with a skewer to determine if they have finished baking. If serving the following day, after they have cooled but are still warm, place them inside a resealable plastic bag. Depending on the topping (which can include black tea, chocolate chips, red bean paste, blueberries, processed cheese [cut into small cubes], or grated cheese), you can enjoy these muffins either for breakfast or for a snack. I think coffee or some other bitter tasting topping goes surprisingly well with these.