1. Preheat oven to 350ºF (177ºC). Line a 12-cup muffin pan with liners and coat with nonstick spray.
2. Mix graham cracker crumbs, melted butter, sugar, and salt until it resembles wet sand. Press 2 tablespoons into each liner. Bake for 5-6 minutes until lightly browned. Cool.
3. Sift flour, cocoa powder, espresso powder, baking powder, baking soda, and salt in a bowl.
4. In another bowl, mix eggs, sugar, brown sugar, oil, vanilla, and buttermilk. Combine with dry ingredients. Divide batter into liners.
5. Bake for 16-18 minutes. Cool completely.
6. Heat heavy cream to boil, pour over chocolate. Let sit 2 minutes. Stir smooth. Chill for 2 hours.
7. Over boiling water, whisk egg whites, sugar, corn syrup until 110ºF. Transfer to mixer, add cream of tartar and vanilla, whip 7 minutes.
8. Core cupcakes, fill with ganache, replace tops. Pipe frosting, toast with torch. Drizzle with ganache, sprinkle crumbs.