For the wild berry crumble, mix flour, sugar, cinnamon and nuts in a bowl. Melt the butter over low heat and mix in with your fingertips. The mass should be coarsely crumbly.
Place in the refrigerator for a short time.
Then place the berries in an ovenproof dish or divide among four ramekins. Crumble the crumb mixture over the berries and bake the wild berry crumble at 170 – 180 °C until the crumbs are lightly browned.