Preheat the oven to 350 F. In the bowl of a stand mixer, cream together the butter, brown sugar, vanilla and egg. In a separate bowl, whisk together the flours, graham cracker crumbs, baking soda and salt.
Turn the mixer on a low speed and slowly pour in the molasses. Beat until fluffy. Then add the dry mixture, 1/2 cup at a time, until totally combined.
Continue to stir the dough on low until a smooth dough forms - it shouldn't stick to the sides of the mixing bowl. Tip the dough out onto a floured surface. Knead a few times then roll into a ball. Chill for about ten minutes.
Pull of 2-3 tablespoon sized chunks off the dough. Roll into a snake-like shape, about 6-8 inches long. Form the snake into a triangle shape. Place on a baking sheet. Repeat rolling out the dough and create a single strip down the center of the triangle. Make a circle and overlap both to create the Deathly Hallows symbol.
Bake for 10-15 minutes, until golden brown and puffed up slightly. Remove and let cool on a rack. Dust with powered sugar as desired. Serve in celebration of You-Know-Who being defeated. Enjoy!