Ingredients
Method
- Preheat oven to 180°C / 160°C fan / Gas 4. Grease and line two 20cm sandwich tins.
- Place all sponge ingredients into one large bowl. Beat with electric whisk for 2–3 minutes until smooth and pale. Scrape down sides and beat once more.
- Divide equally between tins — weigh for even layers. Smooth tops. Bake 22–26 minutes until golden and a skewer comes out clean.
- Cool in tins 5 minutes. Turn out onto a wire rack. Cool completely — at least 45 minutes.
- Place one sponge on serving plate. Spread with jam. Add whipped cream. Top with second sponge. Dust with sugar.
Notes
Butter must be genuinely soft — room temperature, not slightly less cold from the fridge.
Beat for the full 2–3 minutes — under-beating gives a dense, uneven sponge.
The extra baking powder (2½ tsp) is essential for the all-in-one method.
Weigh batter between tins for perfectly equal layers.
Cool completely before filling — 45 minutes minimum.
