In addition, she created a "snack nut" version to show-off the flavor: chocolate-covered pieces of cocoa beans packed in unadorned glass jars.

WSJ: Stuck With 30,000 Boxes of Gourmet Chocolate

The ingredients might make the texture, smell and flavor of chocolate more enjoyable and combine with other ingredients like caffeine to make a person feel good, researcher Daniele Piomelli speculated.

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There is a reason why chocolate peanut butter sells well as an ice cream flavor and watermelon does not.

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If chocolate is your weakness, go for gourmet dark chocolate, which offers beneficial antioxidants along with great flavor.

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Ms. McDonald, originally from Australia and now living in Frankfurt, started Blyss Chocolate because she wanted to bring back the pure flavor of the cocoa bean, without any additives or sugar.

WSJ: Stuck With 30,000 Boxes of Gourmet Chocolate

Amedei, Tuscany's high-end chocolate maker, won't consider creating a special flavor or adding a certain ingredient.

WSJ: The Perfect Box of Chocolates

Meanwhile, prepare the Chocolate Marshmallow Frosting, or another frosting that would go well with the flavor of the ice cream in the cake.

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Typically, it takes her about four to seven trials to nail a new flavor, settling on the right percentage of cacao in the chocolate she's using, for instance, and adding more or less of each ingredient.

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Throughout its 30 years in the luxury chocolate business, La Maison du Chocolat has consistently rolled out unique and unexpected flavor combinations.

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She switched to producing cocoa, cocoa butter and chocolate in Ecuador, cold-pressed and partially hand-milled to retain the flavor and aroma.

WSJ: Stuck With 30,000 Boxes of Gourmet Chocolate