Surprise Heart Trick Cake

In the first bowl, add the contents of one box of cake mix.

Follow the cake mix package instructions, adding two to three eggs and 150 ml of milk.

Mix all the batter ingredients until smooth and combined.

Grease a baking pan with margarine, butter, or oil.

Set aside a small portion of the base batter in a separate container.

Add the chocolate to the reserved portion of batter and mix.

Using the dark chocolate batter, form small balls, as demonstrated.

Use the tip of a knife or a toothpick to draw the heart shape onto the light-colored cake batter already in the pan.

Insert the small chocolate batter balls into the spaces you created, completing the heart design within the main batter.

Bake the cake in a preheated oven at 200°C for 30 minutes.