Ingredients
Method
- Preheat oven to 180°C / 160°C fan / Gas 4. Grease and line a 30x23cm traybake tin.
- Place butter, sugar, eggs, flour, baking powder, milk, and vanilla in a large bowl. Beat with electric whisk 2–3 minutes until smooth and pale. Scrape down halfway.
- Pour into tin. Spread evenly to the corners. Bake 30–35 minutes until golden, springy, and a skewer comes out clean.
- Cool in tin 15 minutes. Lift out. Cool completely on wire rack — at least 1 hour.
- Place cooled sponge on board. Spread jam generously over entire surface.
- Whip cold cream, icing sugar, and vanilla to soft but stable peaks. Spread generously over jam.
- Dust with icing sugar. Arrange strawberry halves in a grid if using. Refrigerate 30 minutes. Cut into 20–24 squares.
Notes
Cool completely before topping — warm sponge melts the cream.
Be generous with the jam — use all 200g right to the edges.
Whip cream to soft but stable peaks — not stiff, not underwhipped.
Refrigerate 30 minutes before cutting for clean, neat squares.
Strawberry halves in a grid pattern tells you exactly where to cut.
Lift sponge from tin before topping — it makes spreading much easier.
Store covered in fridge for up to 2 days. Freeze unfilled sponge for up to 3 months.
