Plum Crumble Cake

Cut the butter into small cubes. Knead the spelt flour, oats, maple syrup, cinnamon, salt, and crumble the mixture with your fingers. Place in a bowl, cover, and let rest in the fridge.

Line a springform pan with baking paper or grease it and dust with flour.

Wash the plums, halve, stone, and slice them.

Beat the butter, cinnamon, vanilla, and salt. Use a hand mixer or a stand mixer with a whisk attachment. Then mix in the maple syrup, eggs, and sparkling water. Fold in the flour and baking powder using a hand mixer or a stand mixer with a dough hook.

Spread the batter in the springform pan and press it down. Create a 2–3 cm (approximately 1 inch) high edge. Prick the dough with a fork.

Arrange the plum slices closely together in a circle on the dough. Distribute the crumble topping over the cake and bake in a preheated oven at 180°C (350°F) top and bottom heat for 30–40 minutes until golden brown.