Add the softened butter, brown sugar, flour, cinnamon, nutmeg, and cardamom to the bowl. Using your hands, mix everything together until pecans are completely coated in mixture.
1/3 (75g) cup brown sugar or coconut sugar, 1/2 (75g) flour all-purpose flour, 1 tsp ground cinnamon, 1/8 tsp ground cardamom, 1/8 tsp ground nutmeg, 4 (57g) Tbsp salted butter, softened, 1/4 tsp sea salt