Confirming the recipe components:

8x Vegetables
4x Vinegar
2x Leavening Agent
2x Sugar

(I was Apprentice 10 in Cooking at that moment.)

2 x Special vegetables
4 x Vinegar
2 x Leavening Agent
2 x Sugar

Apprentice 2

Artisan 6 at time of testing

2 High Quality Veg
4 Vinegar
2 Leavening Agent
2 Sugar

or

1 Special Veg
4 Vinegar
2 Leavening Agent
2 Sugar

2 Green Veg
4 Vinegar
2 Sugar
2 Leavening Agent
Easy Cheap And No Fail. Master 16

1 x Special Vegetables
4 x Vinegar
2 x Leavening Agent
2 x Sugar
Master 6 100% success

Works at least most of the time (not sure percentage at Pro 2) with:
6 Pumpkins
4 Vinegar
2 Sugar
2 Leavening Agent