Experiment:

Basic Traybake Cake

1/2 cup Butter
1 cup Sugar [white or brown]
2 Eggs
1 3/4 cups flour [plain, all-purpose]
3 tsp Baking powder
1/4 tsp Salt
3/4 cup Milk
2 tsp vanilla essence

Cream butter and sugar. Beat eggs and stir in. Sift together flour, salt and baking powder. Add alternately with milk.

I grease the tray and line the bottom with paper - ease of removal. Bake in a 7 x 11" slice tray at 350 degrees for 25-30 minutes. Start checking 5 minutes bfore you think it should be done. It should be done - not overcooked. Mine cooks hot and is done in 18 minutes.

VARIATIONS:
ORANGE: replace milk with orange juice and add 2-3 ts grated orange zest [rind]

LEMON: Substitute 3 tsp lemon extract for vanilla. Frost with lemon icing.

CHOCOLATE: Remove 1/4 c flour, add 1/4 cup cocoa. Frost with chocolate or caramel icing.

FRUIT: Add up to 1/2 c raisins, sultanas, mixed dried fruit: with/without 1/2 ts mixed spice.

ADDITIONS: Add up to 1/2 cup chocolate chips.

ADDITIONS: Add up to 1/2 cup chopped nuts [walnuts, almonds, pecans]. Toasted, preferably.