Line your cupcake/muffin molds with liners. Set aside.
In a large bowl, cream butter and sugar using an electric mixer at medium speed until light and fluffy, about 4-5 minutes.
1 stick unsalted butter, ⅓ cup granulated sugar
Add the eggs one at a time, beating several times every addition. Add the vanilla extract and sweetened condensed milk and beat just a few times to incorporate.
2 medium eggs, 1 teaspoon vanilla extract, 1 can condensed milk
Sift the cake flour, salt and baking powder in a separate bowl. Add the grated cheese and mix.
1 ½ cups cake flour, ¼ teaspoon salt, 1 ½ teaspoons baking powder, 1 cup grated/shredded cheddar cheese
Start to preheat the oven at 180C/360F.
Add half of the dry ingredients to the wet ingredients and fold just to moisten then add the rest and fold until well combined.
Fill each liner with the batter almost full, leaving 1 cm space at the brim. Top them with more grated cheese.
grated cheese
Bake in a preheated oven at 180C/360F for 20-25 minutes or until a toothpick inserted comes out clean.
Remove from oven and allow to slightly cool in the pan.
Transfer cupcakes on a wire rack to completely cool before serving.