Leopard Cupcake Icing Tutorial - Basically she lays down lightest icing, adds darker color and accents with black (not all the way around the design). When the icing has just crusted, she smooths with a paper towel.
Leopard and cheetah cupcakes
How To Make Print Cupcakes animal-print-party-ideas
30 Surprise-Inside Cake and Treat Ideas! This is how to make a cheetah print cake