Ingredients
Equipment
Method
- Position oven rack in the middle and heat oven to 325°F (165°C). Line a 9x13 inch (23x33cm) light-colored aluminum baking pan with parchment paper, leaving at least 2 inches (5cm) overhang on all four sides.
- In a medium bowl, combine 2 cups (200g) graham cracker crumbs, ¼ cup (50g) granulated sugar, and ½ tsp cinnamon. Add ½ cup (113g) melted cooled butter and stir with a fork until every crumb is evenly moistened and the mixture clumps when pressed.
- Transfer crumb mixture to the lined pan. Use the flat bottom of a measuring cup to press into a firm, even layer approximately ½ inch (1.25cm) thick, pressing slightly up the sides.
- Bake the crust for 8 to 10 minutes until the edges are lightly golden and the surface feels set. Remove from oven and cool for 10 minutes before adding filling.
- In a large bowl, whisk together 850g pure pumpkin purée and 1½ cups (300g) granulated sugar until evenly combined, about 30 seconds.
- Add 4 room-temperature eggs one at a time, whisking each in fully before adding the next.
- Add 1½ cups (360ml) heavy cream, 2 tsp vanilla extract, 2 tsp cinnamon, 1 tsp ginger, ½ tsp nutmeg, ¼ tsp cloves, and ½ tsp (3g) fine sea salt. Whisk for 60 seconds until completely smooth and uniform.
- Pour filling over the cooled crust and use an offset spatula to spread it evenly to all four edges.
- Bake at 325°F (165°C) for 40 to 50 minutes. At 40 minutes, gently shake the pan: edges should be fully set, center should have a 3 to 4 inch (7 to 10cm) gentle wobble like set Jello. Pull when you see this — do not wait for the center to look fully firm.
- Cool on a wire rack at room temperature for exactly 2 hours. Do not cover during this time.
- Refrigerate uncovered for the first 2 hours, then cover loosely and continue refrigerating for a minimum of 4 hours total (overnight produces the cleanest cuts).
- Lift slab from pan using the parchment overhangs. Cut a 4x6 grid using a sharp knife wiped clean between each cut. Serve chilled.
Notes
- Pumpkin: use 100% pure pumpkin purée only — pumpkin pie filling has added sugar and spices that make bars over-sweet and unbalanceable.
- Pan: light-colored aluminum only — dark pans overbrown the crust before the filling sets.
- Eggs: room temperature only — cold eggs create uneven texture in the baked custard.
- Heavy cream: full-fat only — half-and-half produces a thinner, less stable set.
- Oven: verify temperature with an oven thermometer — most home ovens run 15–25°F off, which matters for custard.
- Crust: must be pre-baked and cooled before filling — unbaked crust absorbs moisture and stays soft.
- Chilling: 4 hours minimum, overnight is better — bars cut after less time will not hold their shape cleanly.
- Storage: lidded container in refrigerator up to 5 days. Do not use zip-lock bags.
- Freezing: wrap individually in two layers of plastic wrap, freeze up to 2 months. Thaw overnight in refrigerator only.
- Make-ahead: bake up to 3 days ahead — flavor improves after 24 hours.
- Scaling: halve into an 8x8 pan (bake 30 to 38 min); double into two separate 9x13 pans.
- Altitude (above 5,000ft): begin jiggle test at 35 minutes — custard sets faster at elevation.
- Allergens: contains gluten, dairy, eggs. For gluten-free crust, substitute gluten-free graham crackers at equal weight.
- Tip: strain the finished filling through a fine-mesh sieve before pouring for the smoothest possible top.
