Apricot Crumble Cake

Preheat the oven to 350 degrees F (175 degrees C). Grease a 7x11-inch rectangular baking dish and line with parchment paper.

Beat white sugar, butter, and eggs together in a bowl with an electric mixer. Add self-rising flour, milk, vinegar, and vanilla extract and stir with spoon. Pour into the prepared dish. Cover with apricots, pitted-sides down.

Place all-purpose flour, superfine sugar, and cubed butter into a bowl. Rub butter into flour and sugar with your fingertips until crumbles form. Sprinkle topping evenly over the apricots.

Bake in the preheated oven until golden and a toothpick inserted into the center comes out clean, about 40 minutes.