I love chocolate and vanilla, just think about having a vanilla cake with chocolate brownie in the center, so rich that it melts in your mouth. That's why I love this cake. It's quick, easy to make, fail proof, just heavenly.
INGREDIENTS
Part A ( wet ingredients)
Eggs 2 large, if small use 3
Butter 1/2 cup
Sugar a little more than 1/2 cup
Vanilla 1 tsp
Yogurt 1/4 cup
Part B (dry ingredients)
Flour 1 cup + 1/4 cup
Baking powder heaping 1 tsp
Soda 1/4 tsp
Salt a pinch
Part C ( chocolate batter)
Cocoa powder 1/2 cup
Sugar 3 tbsp
Yogurt 3 tbsp
Oil 3 tbsp
DIRECTIONS
1. Prepare pan. I oiled them lightly and then dust with flour. I double the recipe, hence double the pan.

2. Mix the part A ingredients in a bowl. Whisk , whisk, whisk.

3. Sieve part B ingredients in bowl b. Mix throughly.
4. Mix part B into part A. Just don't over mix. Mine even got little clumps.

5. Save about 1/4 cup of batter. Pour rest into prepared pan.
6. Mix ingredients C in the saved batter to make Choco batter.
7. With help of a spoon pour Choco batter over vanilla batter. Just pour it without any style, since choco bater is denser than vanilla, it sinks in during cooking forming a choco blob in center of vanilla.

8. Put pan in oven and bake for 45 minutes or until toothpick inserted comes out clean.

9. Cool on a wire rack. Slice and serve with tea or coffee.
This is a vety easy fail proof recipe. If you are still having douts, click on Perfect cake every time.
Enjoy!!!