Welcome to How to Cook That! I'm Ann Reardon, and today we're making a rainbow steam cake that will surprise you with its simplicity.
For the cake, you'll need flour, water, oil, eggs separated into their yolks and whites. Cream of tartar, sugar, baking powder, salt, and gelatin are also required. We're using the gelatin as an emulsifier to prevent the water and oil from splitting. Now, let's add the sugar, baking powder, salt, and gelatin to the flour and stir it with a whisk until aerated and free of lumps. Please note that all recipe quantities can be found on the How to Cook That website, linked in the description below.
To begin making the cake, create a well in the center of the bowl and pour in the oil, egg yolks, and water without mixing it yet. Now, move over to the other bowl and mix the egg whites with cream of tartar until they have soft peaks. If you don't have electric beaters, you can use hand whisking instead. Be gentle when whisking the egg whites as we want them to retain their airiness.
Now, divide the mixture evenly between 6 bowls, using a measuring cup to ensure each layer is the same thickness. Add a little color to the mixture and gently fold it through. Remember not to stir too fast, as this will cause the air to drop out of the mixture, resulting in a dense cake. Repeat this process with each of your other colors, creating a beautiful rainbow effect.
To bake the cake, use a deep tin and line the base with non-stick baking paper. I recommend using a Bakers Secret tin from an Australian store, but you can find alternatives elsewhere. Pour the purple mixture into the tin and place it on the middle shelf of the oven, adding an empty tray on top to prevent browning and a tin of boiling water on the bottom. The steam created by these ingredients will keep the cake moist while we add layers.
After 9 minutes, the cake won't be fully cooked but will still be set enough to place the next layer on top. Pour the blue cake mixture over the top and bake for another 9 minutes. Repeat this process with each of your colors: green, yellow, orange, and finally red. The red layer should be baked for 11 minutes to ensure it's fully cooked through.
While the cake is cooling, we'll make our ganache by pouring hot cream over chocolate. Let this sit for a minute before stirring it until well combined and smooth.
Once the cake has cooled, run a knife around the edge of the tin, place paper, and a chopping board on top, and flip it upside down. Carefully lift off the base and transfer the cake to a bowl or slightly smaller circle-sized bowl, using it as a guide. Cut off a thin layer from the sides to reveal the beautiful rainbow effect.
Place your plate or cake stand on top, and flip the cake back to its original position. Peel off the baking paper, and you're ready for the final touches! To add moisture to the cake's sides, which are open, we'll use simple syrup made by equal parts sugar and water, microwaved until dissolved. Using a pastry brush, gently add generous amounts of syrup to the cake.
Now, pour your ganache on top in the center, allowing it to drip down over the edge. If you want more drips, simply add more ganache near the edges so that it just overflows. To decorate the top of the cake, dip the base of some macarons in melted chocolate and place them around the top.
And there we have it! A stunning rainbow steam cake, made with love and care. Don't forget to subscribe to How to Cook That for more cakes, chocolates, and desserts. Click on the links provided below to access last week's freak shakes, my previous cake videos, and my YouTube channel. Until next Friday, I'll see you all!