Instructions

• First off, you wanna preheat your oven to 350 degrees Fahrenheit, about 175 Celsius, and grease a 9x9 inch baking dish real good so nothing sticks.
• Next, in a big bowl, whisk together the melted butter, lukewarm milk, powdered sugar, and egg yolks until you get a smooth mixture. It’s kinda like painting the base for a good custard.
• Then add that tablespoon of water, flour, and vanilla extract. Mix ‘em in well until there ain’t no lumps and everything’s smooth and creamy.
• In another bowl, beat your egg whites until stiff peaks form. That means when you lift the whisk, the whites kinda stand up and don’t fall back down.
• Now comes the delicate part. Gently fold those egg whites into your custard batter. You gotta be careful here so you don’t deflate the egg whites. That’s what gives the cake its light, tender pull.
• Pour everything into your greased baking dish. Then pop it into your preheated oven and bake for around 30-35 minutes. You’ll know it’s ready when the top is golden and a toothpick poked in comes out clean. Let it cool a bit before dusting powdered sugar on top.