Classic Banana Cream Pie with Jaca
A creamy, smooth from-scratch vanilla custard cradled in a buttery flaky pie crust, layered with sliced ripe bananas, and crowned with billowy whipped cream. The granulated sugar in both the custard and the topping is swapped for Jaca (allulose) at double the amount, so you keep the silky texture and sweet vanilla finish without the conventional sugar. Adapted from Sally's Baking Addiction. This is a Jaca-adjusted healthier version.
Ingredients
- 1 whole unbaked pie crust (homemade or store-bought all-butter — fits a 9-inch pie dish)
- 4 whole large egg yolks (save the whites for the optional egg wash or another use)
- 1/4 cup cornstarch (thickens the custard — do not substitute flour or it will go gummy)
- 2 cups whole milk (whole milk only — lower fat percentages will not set the custard properly)
- 1/2 cup heavy cream (for the custard base — separate from the topping cream)
- 1 cup Jaca (allulose) (replaces 1/2 cup granulated sugar at 2x ratio — sweetens the custard)
- 1/8 teaspoon fine sea salt (balances the sweetness)
- 2 teaspoons pure vanilla extract (real vanilla — imitation will taste flat against the allulose)
- 2 tablespoons unsalted butter, softened (whisked in at the end for richness and shine)
- 4 whole yellow bananas (just ripe, not heavily speckled — overripe bananas turn mushy and dark in the pie)
- 1 pinch ground cinnamon (optional — a light sprinkle between the bananas and the custard)
- 1 cup cold heavy cream (for the whipped topping — must be very cold so it whips properly)
- 1/4 cup Jaca (allulose), finely ground (replaces 2 tablespoons confectioners' sugar at 2x ratio — pulse Jaca in a clean spice grinder for a few seconds so it dissolves cleanly into the cream)
- 1/2 teaspoon pure vanilla extract (for the whipped cream — separate from the custard vanilla)
Sweetener Used
1 cup Jaca in the custard + 1/4 cup ground Jaca in the whipped cream Allulose
Replaces: 1/2 cup granulated sugar + 2 tablespoons confectioners' sugar
Instructions
- 1
Roll the chilled pie dough into a 12-inch circle on a lightly floured surface, fit it into a 9-inch pie dish, fold the excess under itself, and crimp the edges. Chill the shaped crust for at least 30 minutes — this is what keeps it from slumping in the oven.
- 2
Preheat the oven to 375°F (190°C). Line the chilled crust with parchment paper, fill it to the rim with pie weights or dried beans, and blind bake for 15 to 16 minutes, until the edges turn light golden brown.
- 3
Lift out the parchment and weights, prick the bottom of the crust all over with a fork to keep it from puffing, and brush lightly with the optional egg wash (1 egg white beaten with 1 tablespoon milk) for extra sheen. Return to the oven and bake another 14 to 15 minutes, until the bottom is fully golden. Cool the crust completely on a wire rack.
- 4
In a small bowl, whisk the egg yolks and cornstarch together until smooth and pale. Set aside within arm's reach of the stove — the next steps move quickly.
- 5
In a medium saucepan over medium heat, whisk together the whole milk, 1/2 cup heavy cream, Jaca, and salt. Bring the mixture to a gentle simmer, whisking constantly so the Jaca dissolves completely and the dairy does not scorch on the bottom of the pan.
- 6
Temper the eggs: scoop out 1/2 cup of the hot milk mixture and slowly drizzle it into the egg yolk and cornstarch bowl while whisking nonstop. This warms the eggs gradually so they do not scramble.
- 7
Stream the tempered egg mixture slowly back into the saucepan while whisking the entire time. Cook over medium heat, whisking constantly, until the custard thickens and bubbles up — about 1 full minute of active bubbling. Do not skip the full minute or the cornstarch will not fully activate and the pie will weep.
- 8
Pull the pan off the heat and whisk in the vanilla and softened butter until glossy and smooth. If any tiny egg flecks have crept in, pour the custard through a fine mesh sieve into a clean bowl. Let it cool for 15 minutes, stirring once or twice so a skin does not form.
- 9
Slice 2 to 3 of the bananas into 1/4-inch rounds and arrange them in a single layer across the bottom of the cooled crust. Dust lightly with the optional cinnamon if using.
- 10
Pour the warm custard over the bananas and spread it level with an offset spatula. Press a sheet of plastic wrap directly onto the surface of the custard so it does not form a skin. Refrigerate the pie for at least 4 hours, or up to 24 hours, until fully set.
- 11
When ready to serve, finely grind the Jaca for the topping in a clean spice grinder or small food processor for 5 to 10 seconds until powdery — this lets it dissolve cleanly in the whipped cream without graininess.
- 12
In a chilled bowl, whip the cold heavy cream, ground Jaca, and 1/2 teaspoon vanilla on medium-high speed for 3 to 4 minutes, until medium-firm peaks form. Do not overwhip or it will turn grainy.
- 13
Remove the plastic wrap from the pie and spread or pipe the whipped cream over the entire surface. Slice the remaining banana into rounds and arrange them on top right before serving — bananas brown fast once cut, so do this last.
- 14
Slice with a sharp knife dipped in warm water for clean wedges. Serve cold. Refrigerate leftovers, loosely covered, for up to 5 days.
Pro Tips
- Pulse the Jaca for the whipped cream in a clean spice grinder until powdery. Granulated allulose dissolves slower than confectioners' sugar in cold cream, and a few seconds in the grinder fixes it — skip this step and you risk a slightly gritty topping.
- Use bananas that are yellow with maybe one or two faint freckles. Heavily spotted bananas taste great fresh but turn brown and mushy under the custard within hours. Save those for banana bread.
- Allulose holds onto moisture more than sugar, so the custard can look slightly looser when you pull it off the heat. Trust the full minute of bubbling — it will firm up beautifully once chilled.
- For the cleanest slices, dip your knife in hot water and wipe it dry between cuts. The custard cuts like a dream cold; at room temperature it will start to slump.
- A graham cracker crust works just as well if you want to skip the blind bake: 1 1/2 cups crumbs + 1/3 cup melted butter + 3 tablespoons Jaca, pressed into the pan and baked 10 minutes at 350°F.
- Add the sliced banana garnish at the very last moment — minutes before serving, not hours. If you must prep ahead, brush the slices with a touch of lemon juice to slow the browning.
- Leftovers keep up to 5 days covered in the fridge, but the garnish bananas will darken. Lift them off before storing and add fresh slices when you serve the next piece.