I know it's a bit late, but we're visiting MIL tomorrow and I said I'd make her some mince pies. I have one jar of mix left. The last batch I made was a disaster, overflowed everywhere and stuck to the tray and had to be dug out in pieces. I'd use 1.5 teaspoons of mix per pie. So the second round I used just one teaspoon. Although some overflowed, I managed to get them out in one piece but they were miserably empty when we ate them.
What am I doing wrong? Is the oven too hot? What temp should I cook them at? I used 200 top and bottom heat as said in a recipe I found.