Banana chocolate chips and walnut muffin

Recipe:

55 g brown sugar

50 g butter (room temperature)

1 egg

75g yogurt (can use sour cream as well)

1/4 cup milk

1 medium banana (mashed)

97 g cake flour

1/2 tsp salt

1/4 tsp vanilla

choc chips

Walnut

Procedures:

1. Mix butter and sugar, then add in egg. You just need to use a hand whisk or a spoon to mix these ingredients. Add salt and vanilla essence. Preheat your oven the temperature of 200 celcius (use upper and lower fire).

2. Mash banana with fork, then add milk and yogurt. Mix to the previous mixture.

3. Sift flour and fold in to the butter mixture. It's crucial not to overmix the flour, otherwise your muffin won't rise and it will be hard.

4. Spoon the mixture to muffin molds. 

5. Bake the muffins for about 12-15 minutes.