Wash the mangoes well and peel them.
Roughly chop the mangoes and add them in the blender with sugar and half the quantity of milk mentioned.
Blend all the ingredients well into a puree. Ensure the puree is smooth with no crystals of sugar and no chunks of mangoes remaining.
Take another Bowl. Sieve Flour, baking powder, baking soda and salt together. This is an important step, as it helps to aerate the cake, as well as remove any impurities.
Preheat the oven at 180 C.
In another bowl, add oil and rest of the milk.
Next, add the pureed mango to the above mixture. Whisk and combine all ingredients either by using a hand whisk or an electric blender, till they are emulsified.
Add the Dry ingredients to the above mixture and keep stirring.
You can either add Cardamom powder or vanilla extract at this stage.
Mix all ingredients well to form a smooth lump-free batter. To adjust the consistency you may add some milk, if the batter appears thick.
In a baking tin place a parchment paper or grease it with some butter.
Pour the prepared cake batter into the tin. Tap the tin on the counter after poring the batter.
Bake the cake in a preheated oven at 180 °C for 25 minutes.
Take the cake out of the oven once baked. Insert a toothpick into the cake to check if the toothpick comes out clean.
If some batter sticks to the toothpick you may bake the cake for another 5 minutes or till the toothpick comes out clean.
Let the cake rest in the tin mold for another 10 minutes before you demold it. Demolding the cake when hot may damage the cake.
After Cooling, demold the cake and cut it into pieces of desired thickness.
You may also, make a round cake base in a 6 inch pan and use it as a cake base for Frosted cakes.