For the graham cracker crust, place the two boxes-worth of graham crackers into a food processor and pulverize until you have a fine powder (no chunks). Adding 4 tablespoons-worth of softened butter pieces at a time, pulse the food processor with the butter. Continue for the rest of the butter, until the graham cracker crust comes together in a flaky, slightly-crumbly dough. Spoon the dough into a pie pan. Working the dough along the bottom of the pan and up along the sides, form an even 1/4-inch-thick crust with your hands. If pieces of the crust feel too crumbly, remix until it holds together.

For the honey-sweetened whipped cream, add all the ingredients into a large mixing bowl. Using either a stand mixer or hand mixer, whip the ingredients together until stiff peaks form. This may take about 5 minutes. Set aside in the refrigerator to chill while you prepare the mousse.

For the chocolate mousse, melt the chocolate chips in a double boiler over simmering water. Stir continuously until it's completely melted then set aside off the heat. Place the egg whites in a medium-sized bowl and whip with a mixer until they form stiff peaks. Once the chocolate is cooled so that you can touch it, stir in the three egg yolks. Note that if the eggs are not at room-temperature, the chocolate may seize up - this is OKAY. Don't sweat it, the chocolate will still melt into the rest of the ingredients. Next, fold the whipped egg whites into the chocolate until well-incorporated. Next, spoon in about 1/4th of the whipped cream and fold into the chocolate mixture. Then, fold in another 1/4th of the whipped cream. Pour this now lightened and evenly combined chocolate mousse into the chilled pie crust. Place the chocolate mousse-filled crust in the refrigerator for about 1 hour, or until the mousse starts to set.

To assemble, spoon the remaining half of the whipped cream over the chocolate mousse, sprinkle the top with the shaved chocolate (using a microplane or hand grater), and chill for an additional hour before serving. Serve chilled and with an extra sprinkle of shaved chocolate if desired!