heat oven to 400F. Grease baking pan, 8x8x2". Drain thoroughly 1 can (11oz) mandarin orange segments.
Prepare wild blueberry muffin mix as directed on package except - pour onto pan; arrange orange segments on batter and sprinkle with Struesel Mixture: Mix 1/4 cup brown sugar (packed), 3 tbsp. flour, 2 tbsp. firm butter and 1/4 tsp. cinnamon until crumbly. Bake 25 to 30 minutes.