Beat the egg together with the sugar until the mixture is white. Add the flour, yeast, nut powder, oil and butter. Mix and work the dough well with your hands.
Preheat the oven to 160º C, with thermostat 5-6. Put a piece of greaseproof paper on top and place small pieces of dough with the help of a teaspoon. Put a whole nut on each one.
Bake for 15 minutes.