Step 1

Preheat oven to 180C. Line a baking tin with baking paper. Make cake according to packet instructions. Bake at for 45 minutes. Cool.

Step 2

In a small glass bowl, mix jelly crystals with boiling water. Stir gently. Chill for 30 minutes.

Step 3

Add cream to cooled jelly. Beat until well combined.

Step 4

Spread jelly cream mixture over the cooled cake. Smooth. Chill for 1 hour. Slice into squares and serve.