Substances:
- 5 1/2 cups unbleached all-reason flour
- 1 1/2 tsp. salt
- 1 lb. vegetable shortening, slice into pieces
- 1 egg
- 1 tbsp. white vinegar
- 3 tbsp. unsalted butter, slice into pieces
- 2 cups packed brown sugar
- 1/2 cup pure maple syrup
- 1/4 cup light corn syrup
- 4 eggs
- 1 tsp. vanilla extract
