01 -
Unsalted butter - 5 tablespoons (71g).
02 -
White sugar - 3/4 cup (150g).
03 -
Light brown sugar - 1/2 cup (100g).
04 -
Cold eggs - 2 whole plus 1 yolk.
05 -
Pure vanilla extract - 1 teaspoon.
06 -
Vegetable oil - 1/3 cup (74g).
07 -
Dutch-process cocoa - 3/4 cup (75g).
08 -
All-purpose flour - 1/2 cup (63g).
09 -
Cornstarch - 1 tablespoon.
10 -
Fine sea salt - 1/4 teaspoon.
11 -
Semisweet chocolate chips - 3/4 cup (128g).
12 -
Toffee pieces - 1 cup (170g).