Stir all ingredients except the walnuts together in a medium sized bowl until everything is combined. Then, add in the walnuts and stir until walnuts are evenly coated.
Spread walnuts in a single layer on a baking sheet lined with parchment paper or lightly greased. Bake at 250°F for 30-40 minutes, until golden and crisp. Take walnuts out of the oven and let cool completely before eating.
Store nuts in an airtight container for up to two weeks.