Preheat the oven to 350 degrees F.
Combine all custard ingredients—pumpkin, brown sugar, eggs, cream, pumpkin pie spice, vanilla, and salt—in a large bowl. Whisk very well; the mixture should be completely smooth.
1 (15 ounce) can pure pumpkin puree, 2/3 cup brown sugar, 2 large eggs, 1 cup heavy cream, 2 and 1/2 teaspoons pumpkin pie spice, 1 teaspoon vanilla bean paste or vanilla extract, 1/2 teaspoon kosher salt
Divide evenly among 8 small custard cups or ramekins. (I use and love these; the size is perfect.) Place the filled cups in a large baking pan. (Use two pans if necessary.) Pour enough water into the empty pan around the cups to reach a depth of 1”.
Transfer pans into the oven and bake for 45-55 minutes. They are done when the top is a deep golden brown and a knife or toothpick inserted into the centers comes out clean. (In my experience, custards in a metal pan bake a bit faster than those in glass.)
Remove custards from the water bath and let cool partly at room temperature, then refrigerate for at least 2-3 hours.
Crush the graham crackers into fine bits, either by hand, with a rolling pin, or with a food processor. Stir in melted butter and sugar; mix well.
2 full sheet graham crackers, 1 Tablespoon butter, 1 teaspoon granulated sugar
Sprinkle the graham cracker crumbs on top of each dish. Top as desired with whipped cream, a dusting of ground cinnamon, etc. Serve right away, or cover and refrigerate again until ready. Enjoy!
whipped cream, ground cinnamon, etc.