Walnut cake with salted caramel

Line the bottom of a 24 cm cake tin with baking paper, grease the sides with butter and dust with flour. Preheat the oven to 170°C (fan-assisted).

Sift the flour with the powdered sugar, then mix in the salt and ground walnuts.

Whisk the egg in a bowl with a hand whisk, then gradually add the oil while continuously mixing until you get a mayonnaise-like consistency. Then mix in the buttermilk, and finally add the dry ingredients.