Preheat the oven to 180°C/ 160°C fan/ gas mark 4/ 350°F
Line 2 baking sheets with a liner or baking parchment, or grease with butter
Put 3-4 sweets of the same colour in a plastic bag and crush with a rolling pin
Repeat for all the colours you want to use
For the Stained Glass Biscuits:
Put all the ingredients in a large mixing bowl/ processor. Mix well until all the ingredients are combined(Flour, baking powder, butter caster sugar, egg vanilla)
Tip the dough onto a floured work surface and shape into a ball with your hands. If it feels too soft, put it in the fridge for half an hour
Using a floured rolling pin, roll the dough out to about ½ cm thick. Cut out the biscuits and put onto the prepared baking trays
Cut out a small star shape from the centre. You can cook the stars as tiny plain biscuits
Fill the hole with crushed sweet as carefully as possible, getting some into the points of the star. The sweet will melt to fill the space
If you have time, putting the baking trays in the fridge for 20 minutes before cooking helps to keep the biscuit shape, but it really isn't essential. Add an extra 5 minutes to the cooking time
Bake for 12-18 minutes, depending on size
Cool for a minute or two then turn onto a wire rack until completely cool.
Notes
Storage:
The biscuits keep for at least a week in an airtight container