Chocolate marble cake

Spray the pan with non-stick cooking spray.

Set the dissolved chocolate mixture aside.

In a large bowl whisk the flour, baking powder and salt thoroughly to introduce air; set aside.

In a separate bowl whisk the butter and sugar until creamy and light, about three minutes, scraping down the sides.

Whisk in the egg until completely incorporated, scraping down the sides, then whisk in the vanilla extract about one more minute.

Add half the flour and mix until absorbed, then all the milk and fold until absorbed, then the remaining flour until fully incorporated and smooth.

Transfer about a cup of the batter to a separate bowl and fold in the chocolate mixture for the chocolate batter.

Spread white batter over the base of the pan, drop scoops of chocolate batter on top without mixing, and draw a pattern with a table knife.

Add the rest of the white batter, smooth the surface, top with the remaining chocolate batter and pattern it again.