Double Chip Christmas Fudge Recipe | Epicurious

Ingredients

• 2 cups (packed) light brown sugar
• 1 cup sugar
• 1 cup evaporated milk
• 1/2 cup (1 stick) salted butter
• 1 (7 1/2-ounce) jar marshmallow cream
• 6 ounces butterscotch chips
• 6 ounces milk chocolate chips
• 1 teaspoon pure vanilla extract
• 1/2 cup walnuts, toasted and finely chopped (optional)
• Special equipment: 9-inch square baking pan; candy thermometer