Pineapple Upside-Down Cake Miniatures

1 (18.25 ounce) box yellow cake mix
1 can crushed pineapple, drained
1 jar maraschino cherries
1/2 cup brown sugar
1 tablespoon butter

Prepare cake mix as indicated on box. (Pineapple syrup can be substituted for part of the water indicated on the box.) Use small custard cups. Make paste of butter and brown sugar. Spread paste around bottom of custard cups. Sprinkle crushed pineapple over the butter/sugar mixture. Place cherry in the middle of the pineapple mixture. Pour cake mix into cups not quite half full. Cook each cake approximately 1 1/2 to 2 minutes on HIGH in microwave oven. Use caution when removing them from the microwave and turning out onto a plate.