QUICK! I need Nigella's birthday biscuit recipe or similar

[InTheScrum]

Searched Nigella's site, but couldn't find it.
I need a robust, child-friendly biscuit dough for making Valentine heart biscuits at school.
TIA

Bumpety-bump!

90g soft unsalted butter
100g caster sugar
1 large egg
half a teaspoon real vanilla extract
200g plain flour
half a teaspoon baking powder
half a teaspoon fine salt

1. cream together the butter and sugar
2. beat in egg and vanilla
3. in another bowl combine flour, baking powder and salt
4. add dry ingredients to wet and roll out.
5. bake at 180º/gas 4 for 8-12 mins

Thanks Stubby!