Basic Vanilla Butter Cupcake (one-bowl)

I bake this last Wednesday,  4 June 2014, as suddenly I crave for a simple cake. Originally, I ask Mr Google to give me a simple vanilla cake using oil. However, I found this simple one bowl cake from this website. Hence, I decided to try it out. After taking out the butter from my fridge, I realized that I am running out of baking powder. And again I ask Mr Google to see whether can I replace the baking powder with baking soda or double acting baking powder. Mr Google suggested me to use double acting baking powder as the normal baking powder and hence I proceed with baking this cake.  Below is my version of integrations and steps for this recipe. This recipe able to yield 8 cupcakes. Forgot to take picture of it. Sigh!

Pre-heat air-fryer at 180 degree Celsius for at least 5 minutes. 
Ingredients:
110 grams unsalted butter cut to small cubes and melted at room temperature ( I use salted butter and take it out cold from the fridge and cute into small cubes)
110 grams caster or super fine sugar sifted ( I use 110g normal flour + 6g of double acting baking powder)
110 grams self-raising flour sifted
1/2 tsp baking powder sifted ( I use double acting baking powder, 2 grams)
2 eggs (I use A size eggs)
1/2 tsp vanilla extract ( I use vanilla essense)

Steps:
1. Add all dry ingrediens into a mixing bowl, and whisk to combine.
2. Add all other ingredients and mix until combine.
3. Using an ice cream scoop,  I scoop 1.5 scoop into my cupcake mold.
4. Bake for around 12 to 15 minutes.
5. Done!