01 -
Preheat oven to 350°F (175°C). Combine graham crackers, butter and sugar then press evenly into the bottom and sides of a 9.5"w x 1"h tart pan. Bake for 10 minutes then cool on a rack for at least 15 minutes.
02 -
Sprinkle the gelatin over the cold water and allow to bloom for 5 minutes. Then microwave for 15-30 seconds until just dissolved. Do not boil!
03 -
Melt the white chocolate in the microwave at 30 second intervals, stirring in between until smooth. Heat the milk until just steaming, about 30 seconds. Add milk to white chocolate, whisking vigorously until smooth. Add gelatin and peppermint oil and whisk again until smooth. Let mixture cool to 85°F (29°C) or less but do not let it resolidify.
04 -
Whip the heavy cream and powdered sugar until medium-stiff peaks form. Add 1/3 of the whipped cream to the chocolate mixture and stir until just combined. Then add the remaining whipped cream and gently fold into the chocolate mixture.
05 -
Spoon mousse into cooled tart shell, smooth the top with an offset spatula and allow to set in the refrigerator for a few hours or covered overnight.
06 -
Once the mousse-filled tart is thoroughly chilled, prepare the glaze with all ingredients measured out and ready. Bring cream to a boil and remove from heat. Immediately stir in chocolate until smooth. Stir in corn syrup, then warm water, making sure everything is completely combined.
07 -
Pour glaze onto tart, then tilt and rotate to coat the top evenly and completely. The mousse should not be visible. Let stand until glaze is set, about 1 hour.