Turn on the oven thermostat 5. Place the pecan and 30 g of sugar in the bowl of a food processor and chop finely. Break the eggs. Then separate the whites from the yolks.
Put the yolks in a bowl and reserve the whites in another. Pour 100 g of sugar over the yolks and beat the mixture until it turns white.
Add the butter and coffee without stopping beating. Pour in the flour, mix with a spatula, add the chopped nuts and mix again.
Beat the egg whites until stiff and add the rest of the sugar. Add them delicately to the previous mixture by lifting the mass.
Butter a 24 cm diameter springform pan. Pour in the dough, slide into the oven and cook for 50 minutes. Let stand 5 minutes before unmolding and let cool.