Among the classes Marcel's offers, the retailer's Passport classes, which focus on the cuisine of a specific geographic region, are popular.
In addition to classes, Marcel's hosted about 100 private events in 2014 in its cooking school and its private dining room.
Marcel's offers the best names in cookware, kitchen tools and small kitchen electrics.
Amongst Marcel's clientele, "People are getting more and more into baking," says Williams.
Currently, Marcel's is not looking at expanding into online retailing.
Marcel's deliberately limits online purchasing to classes - 40 percent of all cooking classes are booked online - gift cards and gift boxes.
Marcel's has more than 2,600 followers on Facebook.
Thanks to customers' response, tabletop has become a significant part of Marcel's business, both in space and revenue.
Marcel's opened with four employees who had previous kitchenware retail experience at Williams-Sonoma and Sur La Table.
As part of its focus on customer service, Marcel's staff places purchases in Marcel's branded shopping bags with blue and yellow tissue paper, Marcel's signature colors.
In the three-and-half years since its opening, Marcel's has tripled its inventory, says Williams.
When it comes to cookware, Marcel's sells Mauviel, Le Creuset, Lodge and Swiss Diamond.
And before making big ticket purchases, Marcel's customers are doing their product research online before buying in-store.
Based on the demand for specialty cheeses and charcuterie, Marcel's Jill Foucre will open a cheese shop later this year.