This is a very basic & delicious cupcake recipe.I decorated them using buttercream icing.
Ingredients(12 nos)
100 g Butter in room temperature
100g sugar
100g flour sieved
2 eggs in room temperature
1 tsp Baking powder
½ tsp vanilla essence
Method

Preheat oven for 350F.Line the baking pan with cupcake liners.
In a bowl combine flour & baking powder, keep aside.
Beat butter & sugar together in low speed for 2 minutes. Then gradually add eggs for this mixture and mix in high speed for about 2 minutes until the batter become smooth.
Then add vanilla essence,
Also gradually add flour while beating.
Once it becomes a smooth batter, fill the cupcake liners with batter. Fill upto ¾ of the cup.
Bake for about 20 to 25 mins  or until golden brown.
A tooth pick inserted to cake should come out clean when it is baked.
Once it is baked, transfer to cooling rack to cool down completely
Frosting

I used buttercream icing for decorating.
Used star tip & decorate it with a simple design.