If you prefer a more soufflé-like cake, add all of the chocolate into the egg mixture during step 3. Use a high-quality chocolate. It will make all the difference.

Ingredients

3 tablespoons unsalted butter
2 tablespoons canola oil
3 ounces high-quality dark or bittersweet chocolate (60% to 70% cacao), chopped
3 ounces whole-wheat pastry flour (about 2/3 cup)
1/2 cup unsweetened cocoa
1 1/2 teaspoons baking powder
1/4 teaspoon kosher salt
1/2 cup granulated sugar
1/2 cup packed brown sugar
1/2 teaspoon vanilla extract
3 large eggs
Baking spray with flour
Powdered sugar (optional)

Preparation

1. 1. Combine butter, oil, and chocolate in the top of a double boiler.
2. Cook over simmering water until chocolate almost fully melts, stirring gently with a spatula.
3. Remove top of double boiler; stir until chocolate fully melts.
4. Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, cocoa, baking powder, and salt in a bowl; stir well with a whisk.
5. Place granulated sugar, brown sugar, vanilla, and eggs in a large bowl; beat with a mixer at medium speed until light and fluffy (about 2 minutes).
6. Set aside 2 1/2 tablespoons chocolate mixture.
7. Gradually pour remaining chocolate mixture in a thin stream over egg mixture, beating at medium speed.
8. Gently fold flour mixture into egg mixture.
9. Divide batter evenly among 10 (5-ounce) ramekins coated with baking spray.
10. Working with 1 ramekin at a time, spoon 3/4 teaspoon reserved chocolate mixture into center, pushing teaspoon toward center of batter.
11. Repeat with remaining ramekins and chocolate mixture.
12. Arrange ramekins on a jelly-roll pan.
13. Cover and refrigerate 1 hour.
14. Preheat oven to 400°.
15. Let ramekins stand at room temperature 15 minutes. Uncover and bake at 400° for 13 minutes or until cakes are puffy and slightly crusty on top (centers will not be set).
16. Place a dessert plate on top of ramekin. Using a dry kitchen towel to steady ramekin, invert each cake onto plate.
17. Garnish with powdered sugar, if desired.
18. Serve immediately.