Instructables
Picture of Milk chocolate bowl
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(1st) First one is Milk chocolate bowl with white chocolate swirls on the inside with sprinkles on the edges.  Chocolate ice cream with whipped cream on top.  (2nd & 3rd) Second and Third one is White chocolate with milk chocolate swirls on the inside with cookie dough ice cream and sprinkles..................I didn't do the balloon technique,  I used aluminum foil and a glass bowl.  It is easier and less mess to clean up.