Marble cake

Ingredients :
All purpose flour : 11/4 cup
Butter : 1/3 cup
Sugar :1cup
Egg : 2
Cocoa powder :2tbsp
baking powder : 2tsp
salt : 1/2 tsp
vanilla essence : 1tsp
Milk 1/2 cup + 3tbsp hot milk

Method :
Preheat oven at 180 degree C. grease the baking tin with butter .
sieve together flour , baking powder and salt twice  and keep aside.
In a mixing bowl with an electric mixer  cream butter and sugar until light and fluffy.
Add egg one at a time ,beating  until thoroughly mixed .
with the mixer on low speed add flour mixture and mix until blended.
Now add milk and vanilla essence and mix  well.
Mix cocoa powder in 2 tbsp of hot milk and add into 1/4 th  portion of the batter.
Using 2 large spoons alternate placing large spoonful of vanilla and chocolate batters in the prepared cake pan. Repeat alternating the flavours making about 3 to 4 layers.
Firmly tap the pan on the counter to level the batter. Using a butter knife zig zag the knife through the batters to swirl.
Bake for about 30 to 40 minutes or until a tooth pick inserted comes out clean.
place cake pan  on a wire rack to cool for half an hour and then transfer from the pan  to a cooling rack to cool completely.