Preheat oven at 180C, line a 6" round cake tin with parchment paper.
Put ingredients A in an electric mixer on a very high speed for 8-10 minutes. The mixture will turn white.
Melt the butter and burn it slightly to golden brown. Dissolve condensed milk and salt in it.
Combine ingredients A and B.
Divide the batter into 2, one for the brown parts (1/3) and one for the white part (2/3).
For the brown part, add the coffee and chocolate pastes.
For the white part, add the butter oil essence.
Put a ladle of the white batter into the middle of the pan.
On it, pour 1/2 ladle of brown batter into the middle of the pan, on top of the white layer.
Repeat this layering, always on top of the last pour, until everything is used up.
Sprinkle almonds on top.
Bake for 45-60 minutes. If you don't want the cake to crack, try lowering the temperature to 150C towards for the last 30 minutes of baking.