This Valentine’s Day it was love at first bite. Indulge your sweet tooth at Georgetown Cupcake, which during its first week in business has made more than a few Washington D.C residents break their Lenten commitments.

Sisters and co-owners of Georgetown Cupcake, between M and Prospect, Katherine Kallinis and Sophie LaMontagne, opened their doors for business on Valentine’s Day and have been selling out every day since — that’s 1,000 cupcakes daily.

After being in business only for seven days, the shop already has a loyal following, and new disciples are joining the ranks on a constant basis. As one customer, sitting in one corner, took her first bite of a coconut cupcake, she announced to the owners, “I’ll see you tomorrow!”

The enthusiasm for cupcakes has only escalated over the past few years. According to Kallinis, an episode of “Sex and the City” that features characters Miranda and Carrie enjoying gourmet cupcakes was helped launch the cupcake craze.

“Eating a cupcake isn’t as decadent as having an entire cake, and you can sample a bunch of different kinds,” Kallinis explained.

The shop features a variety of unique flavors, such as key lime pie and lemon blossom, as well as the sisters’ own take on traditional favorites, among them vanilla squared (a vanilla cake with vanilla frosting), chocolate cubed (a chocolate cake topped with chocolate frosting and chocolate sprinkles) and red velvet cake.

“This isn’t your childhood cupcake. This is a designer cupcake. This is a twist on the cupcake,” Kallinis noted. Only high quality ingredients go into these cupcakes, as evidenced by the flavors. The recipes call for Valrhona chocolate cocoa powder and Callebaut chocolate products. Kallinis and LaMontagne begin baking cupcakes on the premises every morning and continue the task throughout the day as customers try them out and feast on their favorites.

Prior to opening Georgetown Cupcake, Kallinis and LaMontagne were involved in the fashion and venture capital industries, respectively. But the sisters have been lifelong bakers, having originally fallen in love with the craft from spending time in the kitchen with their grandmother. Both are self-proclaimed Food Network addicts and Kallinis said that she and her sister had always hoped to channel their talents and passion for the culinary arts. And as the past week would demonstrate, at Georgetown Cupcake, they have found success.

The sisters have hit the perfect cupcake recipe spot-on, as their products are neither dry nor sickeningly sweet. The vanilla cupcake boasts a depth in flavor, and even the bubble gum cupcake, which admittedly lent itself to some hesitation, the sisters said, turned out to be remarkably tasty.

Most notable about Georgetown Cupcake are the frostings that top each baked good. Indeed most of what sets the different varieties of cupcake apart is based on the frostings, each of which is infused with different essences and flavors. “It’s all in the frosting,” claimed Autumn Tani-Winegarden (COL ’11).

The shop’s atmosphere is luminous and welcoming, and the sisters describe their design intentions as being “whimsical.” Silver platters display the assorted cupcakes, which themselves become a part of the design scheme as their spiraled frosting is reflected in the décor. Swirls, stainless steel and vivid pinks and yellows serve as accents against bright white walls. A small table by the window gives patrons a chance to enjoy their cupcakes while immersed in the shop’s sunny ambience.

Prices are not exorbitant by any stretch of the imagination, making these a perfect self-indulgence. Individual cupcakes are priced at $2.75, and a half-dozen will set you back only $15.

The Georgetown community has warmly welcomed Georgetown Cupcake with good reason. In light of the shop’s popularity, Kallinis may have incited some wishful thinking in proclaiming, “I also make a great macaroon,” and perhaps gotten herself into just a little bit of trouble in adding, “Maybe I’ll open up Georgetown Macaroon!”