Mathematical biscuits

Following on from our pizza express visit and costing exercise, we worked out the price for making biscuits.

You will need:
125g margarine
75g caster sugar
1 egg, separated
75g plain flour
25g cornflour
0.5 teaspoon ground cinnamon
0.5 teaspoon ground ginger
75g wholemeal flour
1 tablespoon milk
50g currants
25g mixed peel

What to do
1. Cream the margarine and sugar until light and fluffy.
2. Beat in the egg yolk.
3. Sift the flour, cornflour and Spices together.
Work this into the creamed mixture.
4. Add the wholemeal flour.
5. Add the milk to make a dough.
6. Mix in the currants and mixed peel.
7. Roll out the dough (5mm) and cut into round shapes.
8. Put the biscuit shapes on to a greased baking sheet.
9. Bake in the oven for 10 minutes at 200C/400F/Gas Mark 6.
10. At the end of the cooking time, whisk the egg white. Brush this over the biscuits and sprinkle them with some sugar.
11.Put them back into the oven for 5 minutes.
12. Cool the biscuits on a wire rack.

This will make approx 20 biscuits.

Price list
250g tub of margarine - 50p
500g caster sugar -60p
6 eggs -90p
1 kg plain flour -£1.00
500g cornflour -40p
1kg wholemeal flour -£1.20
250g currants -£1.25
100g tub of mixed peel -75p

Imogen worked out the cost of making 30 biscuits and Jemima 40 biscuits.
When Imogen did the calculations, she needed 1.5 eggs, which lead on to us discussing whether to round up or down. And then later, we cracked an egg and got...

a double yolk, Is this 1.5 eggs!

After the girls had worked out the costings of the biscuits, we talked about arranging the biscuits on the baking tray, and in the process covered multiplication and factors.

The girls didn't want to make the biscuits, and made a carrot cake.

Thanks to our hens laying double yolkers, it was slightly eggy!