Butterscotch without lemon wafers

1/2 cup unsalted butter , cubed 1 (1 ounce) unsweetened chocolate square 2/3 cup brown sugar , packed 1 egg 1 teaspoon pure vanilla extract 1 cup all-purpose[...]

1 cup quick-cooking rolled oats 1 cup regular oats 1 1/2 cups butter (soft or melted) 1 1/2 cups brown sugar 2 1/2 cups flour 1 teaspoon salt 1 teaspoon[...]

1 1/2 cups 2% low-fat milk 3/4 cup packed dark brown sugar 2 tablespoons cornstarch 1/8 teaspoon salt 2 large egg yolks 2 tablespoons butter 2 teaspoons[...]