Heat oven to 325 F

Beat oil and egg in a medium speed for 1-2 minutes

Add in extracts and beat again

Then add in 1 cup sugar bits by bits; at this stage, mixture will be slightly thicken and oven heat is ready; so turn off the oven and keep the door closed

Add in cocoa powder into the mixture bits by bits and keep beating until well blended

Then add in the baking powder and keep beating

Pour in the last 1/2 cup sugar and beat well

Then add in mashed banana and keep beating

Lastly, add in flour little by little; mixture will be thicken even more. This is when you turn on the oven again.

Beat mixture until very well blended.

Pour batter onto a baking sheet of 8 or 9 inch that already lined with parchment paper or aluminum foil. Sprinkle top with almond slices.

When the oven is ready again, bake cake for 25 minutes

Slice to serve