{"id":166198,"title":"Gluten-Free Pistachio Flan Tart","modified":"2026-08-25T19:15:06+02:00","plain":"Looking for a pistachio dessert that slices cleanly without feeling heavy? This flan tart gets straight to the point: a firmly packed crumb base topped with a pistachio custard baked until just set.\n\n\n\nWhen you cut into it, the filling stays tender, almost wobbly, with the pistachio coming through clearly after the vanilla. It\u2019s made without gluten or lactose, without losing what makes this dessert special. This recipe joins my other gluten-free cakes and desserts.\n\n\n\nMake it with a well-baked gluten-free shortcrust pastry.\n\n\n\nWhat is a gluten-free, lactose-free pistachio flan tart?\n\n\n\nIt\u2019s a baked custard tart, made here with a crumb crust rather than shortcrust or sweet pastry. That\u2019s exactly what makes it so easy to put together: all the base needs is fine crumbs and melted butter, followed by a short chill to firm up.\n\n\n\nThe filling works like a vanilla pastry cream. Here, the pistachio custard is made the same way, then the pistachio paste is added off the heat. Oat milk and plant-based butter keep the dessert lactose-free.\n\n\n\nThe finished texture shouldn\u2019t be overly firm. The top sets and colors, sometimes browning deeply in spots, but the center should still wobble when it comes out of the oven. After chilling, you\u2019ll get a clean slice while keeping that soft middle.\n\n\n\nThe main ingredients\n\n\n\nFor the base, you can use gluten-free, lactose-free graham-style cookies, or even cake scraps, as long as they meet the same requirements. Chef Rommel Reyes uses leftover gluten-free chocolate sponge cake, which saves you from buying extra cookies.\n\n\n\nIf you\u2019re using sponge scraps, cut them into small pieces, then bake and dry them at 150\u00b0C for about 30 minutes. Once fully dry, blitz them in a food processor, just as you would cookies. In both cases, you\u2019re aiming for fine crumbs before mixing them with the melted butter.\n\n\n\nMix the fine crumbs with melted plant-based butter, then press them firmly over the base and sides of a springform pan or entremets ring. The 15-minute chill in the refrigerator isn\u2019t just for show: it helps the crust set and firm up before filling.\n\n\n\nFor the filling, oat milk provides the liquid base. Egg yolks, sugar, vanilla, and cornstarch make up the custard, and pistachio paste brings the final flavor. If you have time, make the pistachio paste yourself; otherwise, a good store-bought version that is gluten-free and lactose-free will work just as well.\n\n\n\nA fully vegan version is possible too. For the base, use the baked and dried sponge mentioned above or vegan, gluten-free graham-style cookies. For the pistachio custard, start with a vegan pastry cream and a 100% pistachio paste that is both vegan and gluten-free.\n\n\n\nAnother baked custard to try: pandan cr\u00e8me br\u00fbl\u00e9e.\n\n\n\nTechnical pointers and pitfalls to avoid\n\n\n\nThis recipe comes down to two things: a well-chilled crust and a perfectly smooth custard. Nothing is difficult, but each step matters, and if you rush them, the texture will show as soon as you slice it.\n\n\n\nMaking a crust that holds together\n\n\n\nThe crumbs should be fine, not coarse. You can crush them by hand, but a food processor is quicker, whether you\u2019re starting with cookies or dried sponge cake. Then mix the fine crumbs with the melted butter and press the mixture firmly over the base and sides of the pan.\n\n\n\nYou can use a springform pan or a ring mold. What matters is pressing firmly enough for the crust to hold together. After that, chill it in the refrigerator for at least 15 minutes so it sets and firms up. It needs to stay cold when you pour in the custard.\n\n\n\nCooking the custard gently\n\n\n\nStart by heating the oat milk in a saucepan. In a separate bowl, mix the egg yolks, sugar, vanilla, and cornstarch, then pour in \u2153 of the hot milk first. Whisk until the sugar and cornstarch are fully dissolved; this step really matters.\n\n\n\nPour everything back into the remaining hot milk and cook over low to medium heat. Stir constantly until the custard thickens. Once you take the pan off the heat, add the pistachio paste and the cold plant-based butter.\n\n\n\nFor an even smoother texture, blend the custard with an immersion blender. Transfer it to a completely dry container, cover it directly with plastic wrap, and chill it in the refrigerator for at least 1 hour, ideally overnight.\n\n\n\nBaking and final set\n\n\n\nBefore baking, preheat the oven to 180\u00b0C. Whisk the chilled pistachio custard to loosen it, then pour it over the cold crust. Tap the pan a few times to release any air bubbles, then smooth the surface with a large spoon or offset spatula.\n\n\n\nBake for 40 to 50 minutes. The top should brown lightly, almost scorched in places, while the center still has a wobble. That contrast is what gives the tart its ideal texture after chilling.\n\n\n\nLet the tart cool first, off the baking sheet, then refrigerate it for at least 4 hours, ideally overnight. Just before serving, brush the top with a warm, clear neutral glaze.\n\n\n\nStorage\n\n\n\nThe most important thing here is the chilling time, both before and after baking. The crust needs at least 15 minutes in the refrigerator before filling, the custard needs at least 1 hour, ideally overnight, and the baked tart needs another 4 hours at minimum, ideally overnight as well. In short, this is a dessert that benefits from being made ahead.\n\n\n\nIf you\u2019re after something creamy and tangy, try the mini lemon meringue tart.\n\n\n\nYou\u2019ll find all my other gluten-free recipes here.\n\n\n\nRecipe developed by chef Rommel Reyes. Find his work on Instagram, his Substack newsletter, and his YouTube channel.\n\n\n\n\n\n\tGluten-Free Pistachio Flan Tart\n\t\t\n\t\t\t\n\t\n\t\t\t\n\t\n\t\t250 g homemade gluten-free, dairy-free graham crackers80 g gluten-free, lactose-free unsalted butter (melted)750 g oat milk (barista-style, gluten-free)75 g pistachio paste130 g sugar60 g cornstarch165 g egg yolks (about 8 large egg yolks)1 bean vanilla\t\n\t\n\t\tCrumb CrustCrush the graham crackers into fine crumbs.Pulse them in a food processor to speed things up.Combine the crumbs and melted butter in a mixing bowl.Press the crumb mixture firmly over the bottom and up the sides of a springform pan or cake ring.Chill for at least 15 minutes, until the crust is set and firm.Pistachio Pastry CreamHeat the oat milk in a saucepan.Whisk the egg yolks, sugar, vanilla, and cornstarch together in a bowl.Whisk one third of the hot oat milk into the egg mixture until the cornstarch and sugar are fully dissolved.Pour the mixture back into the remaining hot milk and cook over medium-low heat, stirring constantly, until thickened.Remove from the heat.Add the pistachio paste and cold vegan butter.Blend with an immersion blender until smooth.Transfer to a clean, dry container.Cover with plastic wrap.Chill for at least 1 hour, preferably overnight.Bake the Pistachio Flan TartPreheat the oven to 180 \u00b0C.Whisk the chilled pistachio pastry cream until loosened.Pour it over the chilled crumb crust.Tap the pan a few times to release any air bubbles.Smooth the top with a large spoon or offset spatula.Bake for 40 to 50 minutes, until the top is lightly caramelized.Check that the center still has a slight wobble.Let cool off the baking sheet, then refrigerate for at least 4 hours, preferably overnight.Brush the top with warm clear fruit glaze just before serving.","_links":{"self":[{"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/posts\/166198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/comments?post=166198"}],"version-history":[{"count":0,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/posts\/166198\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/media\/164640"}],"wp:attachment":[{"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/media?parent=166198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/categories?post=166198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/marcwiner.com\/en\/wp-json\/wp\/v2\/tags?post=166198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}