Preheat the oven to 325ºF with a rack in the middle and butter 6, 8-ounce ramekins.
Add the cream to a medium saucepan and warm over medium-high heat. Stir in the mascarpone, vanilla, whiskey and ¼ cup sugar and bring to a boil, whisking constantly. Remove from the heat and let rest for 15 minutes.
Meanwhile, beat the egg yolks and honey together until frothy. Slowly whisk in the cream mixture. Pour the mixture into the ramekins.
Place the ramekins in a pan and fill the pan with hot water until it reaches halfway up the ramekins. Bake for 45 to 50 minutes, until mostly set but still a little jiggly in the middle. Remove the ramekins from the water bath, cover and place in the icebox for at least 2 hours or up to 3 days.
Just before serving, sprinkle 1 teaspoon of sugar on top of each of the ramekins. With a culinary torch on high, heat the sugar until a dark golden brown and crisp crust forms. Serve immediately.