Prepare a baking sheet by lining it with parchment paper and set aside.
Melt the butter in a large skillet over medium heat on the stove.
¼ cup butter
Add the white sugar, brown sugar, and salt and stir to combine.
¼ cup granulated white sugar, ¼ cup packed brown sugar, ½ teaspoon salt
Cook for 3-4 minutes, until the sugars have dissolved and have started to melt into a thickened caramel.
Add the walnuts and stir to coat.
2 cups walnut halves
Continue cooking for another 3-4 minutes until the sugar mixture has taken on a dark amber color.
Immediately pour the candied walnuts onto the lined baking sheet and spread in a single layer. Work quickly, as the candy coating will harden very fast.
Allow the walnuts to cool to room temperature, then break apart or chop before serving.
Notes
Be sure to keep a close eye on the pan and stir constantly to avoid burning the sugar.
For a deeper nutty flavor, toast the walnuts on a baking sheet in the oven in a single layer for 8-10 minutes at 325°F before making the candied nuts.
To make spiced nuts, sprinkle with ground cinnamon immediately after adding the nuts to the caramel mixture.
Substitute other nuts like pecans, cashews or almonds.
Serving ideas: sprinkle on salads, roasted vegetables (squash, sweet potatoes, brussels sprouts), oatmeal, waffles, pancakes, yogurt parfaits and ice cream.
Store completely cooled nuts in an airtight container on the counter. They'll keep for about 5-7 days.
Recipe makes about 2 cups of candied nuts. A serving size is 1/4 cup of nuts.