Zena's Coffee Caramel Slice

120g butter
180g sugar
2 egg yolks
1 cup cornflour
1 cup flour
2 teaspoons baking powder
1/2 teaspoon mixed spice
1 teaspoon instant coffee
1 teaspoon cinnamon
raspberry jam

Cream butter and sugar. Add egg yolks and sifted dry ingredients. Press into a sponge roll tin and spread with jam.

Topping
2 egg whites, stiffly beaten
1 cup brown sugar
1/2 cup chopped walnuts
1/2 cup coconut
1 teaspoon vanilla extract

Fold other topping ingredients into whites. Spread over slice. Bake 30 minutes at 180C. Cut when cold.