Make the Biscoff sponge
Pre-heat your oven to 160°C/140°C fan.
Line 2x20cm sandwich tins with greaseproof paper or reusble baking liners.
Crush the Biscoff biscuits (120g) until fine - I use a pestle and mortar, but you could also use a food processer or place the biscuits in a bag and hit them with a rolling pin.
Place all of the cake ingredients into a large bowl (crushed Biscoff biscuits, 140g soft margarine, 120g soft light brown sugar, 240g Biscoff spread, 120g self-raising flour, 4 medium eggs and 1 tsp baking powder).Mix together, using an electric mixer on a low speed or by hand, until combined. Divide the mixture between the two tins and bake for 30-35 minutes until a skewer entered into the middle comes out clean.
Once baked, remove the cakes from the oven and leave them to cool in their tins for 10 minutes, before removing the tins and cooling completely on a wire rack.
While the cakes are cooling, make the Biscoff buttercream
Beat together the butter (125g) and Biscoff spread (250g)
Add the icing sugar (185g), a tablespoon at a time, and beat until combined and smooth.
Check the consistency of your buttercream, it should be soft and pipeable, but not runny. If it is a little stiff, add milk (no more than one teaspoon at a time). Beat in each addition thoroughly before adding more.
If it is your first time making this cake or you have a question, please take a look at the FAQs above the recipe.
If you would like to know the ingredients for a different size of tin, scroll down to find my calculator.
Calories: 611kcal | Carbohydrates: 65.5g | Protein: 5.1g | Fat: 36.6g | Saturated Fat: 12.3g | Sodium: 308mg | Fiber: 0.8g | Sugar: 45.3g
Any nutritional information provided is the estimated nutritional information per serving. Please refer to my guide to Charlotte’s Lively Kitchen nutritional information if you would like to learn more about how this is calculated.
Keyword: Lotus Biscoff, Speculoos Cake
Author: Charlotte Oates