Mix flour with baking powder, sift into dough and stir until smooth.
Divide some of the dough into muffin tins. It is better to use silicone molds, but you can also use ordinary molds, in which you should put cuffs, in order to avoid sticking of the dough (I have nothing stuck).
Place a teaspoon of boiled condensed milk filling in the center.
Top with the remaining dough (tablespoon each).
Heat the oven to 180 degrees. Bake muffins with boiled condensed milk until golden brown, about 30 minutes.