Preheat oven to 180 degree C. Grease a 9x5 inch loaf pan with oil and dust it with flour. Coat on all sides and set aside.

Now take butter, sugar and vanilla in a bowl and whisk well. Add in eggs one at a time and whip till creamy. Now add in flour, baking powder and salt and fold gently. Add in milk and fold gently. Divide the batter between 6 bowls and add one food colouring in each one and mix well. Now spoon this into the loaf pan and use a skewer to make swirls on it.

Now bake this in oven for 45 mins to 1 hour till the cake is done. Remove it and cool down completely. Now slice this into pieces and cut out heart shape using this. Put this in fridge for 30 mins to 1 hour or so.

Preheat oven to 180 degree C. Grease a 9x5 inch loaf pan with oil and dust it with flour. Coat on all sides and set aside. Now take butter, sugar and vanilla in a bowl and whisk well. Now add in eggs one at a time and whip till creamy. Add in flour, baking powder and salt and fold gently.

Now take the loaf pan, spoon ¼ of the cake batter, spread evenly, now arrange the hearts on it and spoon the remaining batter in and bake for 35 mins to 45 mins. Now let the cake cool down, slice and serve.

Preheat oven to 180 degree C. Line a loaf pan with parchment paper and set aside.

Take butter, sugar, vanilla in a bowl and use a beater to whip till creamy. Now add in one egg at a time and beat till creamy. Now in a separate bowl, mix flour, cocoa powder, coffee powder, baking powder and salt. Now add this dry ingredients into the egg mixture along with milk and mix well

Now take the loaf pan, Spoon little chocolate batter in, now spread it evenly. Now place heart side down and arrange it over the chocolate batter. Spoon remaining chocolate batter in and tap gently. Bake this for 40 to 45 mins. Remove and cool completely.

If you are making chocolate glaze. Take icing sugar, cocoa powder, water in a sauce pan, heat till it melts and becomes creamy. Now pour this over the cake. Decorate it as you like. Leave to set for 1 hour. Slice and serve.