Mexican Bun Paste For Topping

You can buy a Mexican bun in every corner Malaysia.It is a simple kind of bread with coffee emulco(thicker than essence)with a tsp of butter as a filling.I remembered during my vacation back home in kota kinabalu,my sister said there is small stall cater only Mexican bun in a Shopping mall(Center Point)selling it like hot cake.It was a long line up the day of their opening and people are willing to wait in the long line just to buy this Bun.I told my sister,that's crazy!What so special about it.I used to bought it my a bakery shop.Due to my curiosity and I can't wait to tried it.To tell the truth,the taste is owesome.You can't resist to buy it if you walk by pass the stall.Now,I had the recipe and know how to make it my own.
I can have it any time I want.

Prepare(Sweet Bun) for topping the Coffee paste

Recipe(Coffee Paste)
Ingredients

50g Butter
50g Castor sugar/Icing sugar
1/2 Egg
50g Cake flour/All purpose flour
2tsp Coffee emulco/essence
1tsp Cocoa powder/Chocolate food colouring

Method
(1)Blend all ingreadients together.
(2)Put the mixture into a piping bag.
(3)Pipe as circle direction from inside to outside.