Rush Patisserie-Rated 4 stars TXMB [dropcap coloI[/dropcap]t all started as a joke and ended with teeny spoons tied around cutesy thick glass jars. One joke spawned an order of 1500 that ended up shipping across the United States. And just like that the cupcake that never was went from chuckles to cash. The Un-Cupcake is the sweet wit of Samantha Rush, owner of Rush Patisserie, Pastry Boutique and Cake Salon. A French style Bakery, Rush has plenty of exquisite desserts, including macaroons, tarts, wedding cakes and of course the Un-Cupcake. It comes in several flavors, but most Dallas folks are coming in for the red velvet. If you ask Samantha,…