Makes one tray of 30 x 40 cm. Use ¾ recipe for a 22 cm spring form tray (about 6 cm thick).

Ingredients

• 420 g flour
• 2 EL cornstarch
• 2 packets baking powder
• 240 g sugar
• Vanilla
• Zest of 2 organic oranges or lemons
• 170 ml oil (e.g. sunflower)
• 420 ml soda water
• For chocolate biscuit: 30-50g cocoa powder

Preparation

STEP 1: Preheat oven to 180° (upper and lower heat). Mix the sieved flour and the other dry ingredients with a whisk.

STEP 2: Add oil and soda water and mix quickly, stirring only 10-15 times. Small lumps are ok and will dissolve while baking.

STEP 3: Transfer to baking try and bake on the middle rack for 25-30 minutes. Leave in the tray to cool down.

For tiramisu, cut into rectangular biscuits and bake again at low heat until the biscuits are completely dry.