Preheat the oven to 325F.
Add the heavy cream to a 2 quart saucepan over medium heat.
On a cutting board and using a sharp paring knife, cut the vanilla bean lengthwise down the middle. Scrape out the seeds with your knife and add both the seeds and pod to the warming cream. Heat until small bubbles appear around the pan's edges, then take off the heat.
Whisk the whole egg, egg yolks, and maple syrup together in a large bowl until fully combined. Gradually add the hot cream to the egg mixture while whisking constantly until smooth and uniform in color. Strain through a fine-mesh sieve to catch the vanilla pod pieces and any bits of cooked egg. For easier handling in the next step, strain directly into a large spouted measuring cup.
Arrange the ramekins on a 9X13 pan. Pour custard into each ramekin to the brim. Add hot tap water to the baking sheet until it reaches halfway up the mold sides.
Bake for approximately 40 minutes until the edges are set but the center jiggles slightly when gently shaken.
Remove pan from oven and let cool 30 minutes. Remove molds from the water bath and transfer to refrigerator for at least 2 hours (up to 3 days) to allow the custards to fully set.
Once custard is set, just before serving, sprinkle 2 teaspoons of grnualted sugar on each top. With a kitchen torch, about 1 inch away from the surface, brulee the top of each custard.