4tablespoonsunsalted butter cut in 1 tbsp pieces, softened(56 grams)
2teaspoonpure vanilla extract
½teaspoonsalt
⅓cupvegetable oil
3large egg yolks -- bring to room temperature
2largeeggs -- bring to room temperature
Instructions
Preheat oven to 350 degrees F. Spray a 9x2 inch round cake pan with cooking or baking spray and line with a round of parchment paper. Alternatively, you can use two pans (for thinner layers).
With clean beaters, whip the cream and set aside. If you are worried your whipped cream won't hold up you can do this step last, but I like to do it first to get it out of the way, especially if making this cake with a handheld mixer and one set of beaters.
Thoroughly mix flour and baking powder in a bowl and set side.
Put the sugar in the mixing bowl. Add the hot water to the sugar and beat with a heavy duty scraper for a few seconds to dissolve the sugar. Add the butter, vanilla, and salt. Add the oil and mix on medium speed with an electric mixer to blend.
Sprinkle about ⅓ of the flour mixture over the sugar mixture. Beat by hand or with the mixer. Continue adding the flour until all is incorporated. By hand, stir in the egg yolks one at a time, and then stir in the whole eggs one at a time.
Fold about a third of the whipped cream into the batter to lighten, then fold in the rest.
Pour the batter into pans. Drop the pans onto the counter from a height of about 4 inches a few times to get out any bubbles. If making one thick layer, the bake time should be around 40 minutes. If making two thinner layers, the bake time will be closer to 25 to 30 minutes. The top will be very brown due to all the sugar and the internal temperature of the cake should be around 209F.