Triple Chocolate Donut a.k.a Choco Lanay

Ingredients:
*Dough
1/8 cup brown sugar
1/4 cup cocoa powder
1 tsp instant yeast
1 medium egg
1/3 cup oil
2/3 cup water
1 1/2 cup all purpose flour
1/4 tsp salt
*Filling
3 tbsp cornstarch
1/2 cup cocoa powder
1/2 cup brown sugar
1 1/2 cup evap milk or 1 can
1 tsp vanilla
*Coating
2 1/2 tbsp powdered milk
2 tbsp powdered sugar
2 tbsp cocoa powder
Oil (frying)