Nkate cake (or kongodo) is a deliciously crunchy brittle made from peanuts, that is popular in Equatorial Guinea and Ghana.
Preheat the oven to 320 F / 160 C.
Cook the sugar over medium heat and let it dissolve until it reaches a temperature of 320 F / 160 C on a candy thermometer.
Spread the mixture on a previously oiled cutting board (or between 2 sheets of parchment paper) and use a rolling pin to flatten it to a thickness of about ⅓ inch (6 mm)
Using a large sharp knife, make slight incisions of 2-inch (5 cm) squares very quickly while the mixture is still hot. Operate very quickly before it hardens.