-
Put oven rack in middle position and preheat oven to 400°F Brush molds with some melted butter, then chill until set, about 5 minutes.
-
Brush molds again with some melted butter and chill pan.
-
Sift together flour, baking powder, spices, and a pinch of salt.
-
Whisk together sugars and eggs until combined well. Add flour mixture and whisk until just combined, then stir in remaining butter (6 tablespoons) until just incorporated.
-
Spoon batter into molds, filling them about two thirds full. Bake 5 minutes, then reduce oven temperature to 350°F and bake until springy to the touch and edges are lightly browned, 4 to 6 minutes.
-
Turn out onto a rack and cool 15 minutes. Just before serving, dust with confectioners sugar.