INGREDIENTS
3/4 cup
or 170g) unsalted butter
3/4 cup
packed dark brown sugar
1/4 cup
granulated sugar
1
large egg, at room temperature
2 tsp
vanilla extract
1
and 3/4 cups all-purpose flour* (measured correctly)
2 tsp
cornstarch (aka cornflour)
1 tsp
baking soda
1/2 tsp
salt
3/4 cup
pretzel pieces
3/4 cup
M&Ms