Brush a sheet pan generously with vegetable oil. Combine the cashews, walnuts, pecans, almonds, 2 tbsp of vegetable oil, maple syrup, brown sugar, orange juice and chipotle powder on the pan.
Toss to coat the nuts evenly. Add 2 tbsp of the rosemary and 2 tsp of salt and toss again.
Spread the nuts in one layer. Roast the nuts for 25 minutes (i did it more like 17 minutes as my oven errs on the hot side), stirring twice. Remove from the oven and sprinkle with 2 more tsp of salt and the remaining 2 tbsp of rosemary.
Toss well and set aside at room temperature, stirring occasionally to prevent sticking as they cool. Store in airtight containers at room temperature
Recipe by Sugar Plum Sisters at https://sugarplumsisters.com/2014/03/chipotle-and-rosemary-roasted-nuts/