Preheat oven to 400°F. Line or grease a 12-cup muffin pan.
Place raisins in a bowl and cover with boiling water. Let sit 15 minutes, then drain and pat dry.
In a large bowl, whisk together kamut flour, baking powder, salt, cinnamon, and brown sugar.
In another bowl, whisk melted butter, egg, milk, and vanilla until smooth.
Pour wet ingredients into dry ingredients. Stir until just combined, then fold in raisins.
Divide batter evenly into muffin cups, filling about 3/4 full.
Mix 2 tablespoons brown sugar with 1 teaspoon cinnamon and sprinkle on top of each muffin.
Bake 17–20 minutes, or until a toothpick inserted in the center comes out clean.
Cool in the pan for 5 minutes, then transfer to a wire rack. Serve warm or at room temperature.