Slab Magic: Rhubarb & Pistachio Brown Butter Financier
Growing up in Paris, financiers were fussy little ingots of almond and butter. Beautiful, but tedious. Years later in my tiny Bay Area kitchen, staring at a gorgeous stalk of spring rhubarb, I wanted that sharp, fruity bite against nutty richness. But I refuse to wash a dozen tiny molds on a Tuesday. We’re not suffering for brunch.\n\nSo, we scale it up. This Rhubarb & Pistachio Brown Butter Financier is baked as one giant slab. The magic here is the beurre noisette (brown butter—cooked until the milk solids toast, giving an intense hazelnut aroma). Combined with egg whites, it creates a crumb that’s lacy inside but wildly chewy at the edges.\n\nYou can make this your own: swap rhubarb for tart plums or raspberries later in the season.\n\nCami’s shortcut note: Use one bowl. Just whisk the egg whites until frothy—no stiff peaks needed. The fridge is your friend; chill the batter for 30 minutes if you have time, to relax the flour and boost the chew.\n\nDon't skip this: Push the bake. Pull it only when the edges are dark golden and visibly pull away from the pan. Butter is not a garnish, and an underbaked financier has a tight crumb like a bad alibi.
Featured Recipe
Rhubarb & Pistachio Brown Butter Financier
A giant, sliceable financier—that chewy, nutty Parisian cake—scaled up for a weeknight pace. We skip the fussy little molds, use a single mixing bowl, and let sharp rhubarb cut straight through the rich, crackly pistachio crust. It’s elegant, deeply sensory, and completely zero-drama.
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Timeline
Ingredients
- 150 g Unsalted cultured butter(Plus 1 tsp softened for greasing the pan)
- 200 g Rhubarb(Cut into 1/2-inch pieces)
- 100 g Ground pistachios(Or pistachio flour)
- 150 g Granulated sugar(Plus 2 tbsp for topping)
- 50 g All-purpose flour(Just enough to bind)
- 4 large Egg whites(Straight from the carton or fresh, unwhipped)
- 1 tbsp Orange zest(Freshly grated)
- 1 tsp Flaky sea salt(Essential for balance)
- 1 tsp softened butter(for greasing the pan)
- 1 sheet parchment paper(for lining the pan)
Instructions
- 1
Preheat oven to 375°F (190°C). Grease an 8-inch round cake pan or cast-iron skillet with 1 tsp softened butter and line the bottom with parchment paper. You want a pan that conducts heat well to ensure that signature crisp edge.
5 min
Tip: Don't use a glass dish here; it won't give you the crust you need.
- 2
In a small saucepan over medium heat, melt and brown 150g unsalted cultured butter. Swirl the pan constantly. It will aggressively bubble, foam, and then suddenly smell intensely of toasted hazelnuts. Once you see golden-brown flecks at the bottom, pull it off the heat immediately.
5 min
Tip: Let your nose guide you. The transition from melted to browned happens in seconds.
- 3
While the butter browns, whisk the 100g ground pistachios, 150g granulated sugar, 50g all-purpose flour, 1 tsp flaky sea salt, and 1 tbsp orange zest in your one large mixing bowl. Break up any stubborn pistachio clumps with your fingers.
3 min
Tip: Rubbing the orange zest into the sugar first releases the essential oils, amplifying the citrus note.
- 4
Pour the hot browned butter—scraping every single toasted brown bit from the bottom of the pan—directly into the dry ingredients. Whisk until it forms a thick, fragrant paste.
2 min
Tip: The dry sugar and cold nuts instantly drop the temperature of the butter. This is the shortcut that lets us add eggs immediately.
- 5
Pour in the 4 large egg whites. Whisk vigorously for about 30 seconds until the batter transforms from a greasy paste to a smooth, glossy, and cohesive ribbon. No need to whip the whites to peaks; we just rely on their protein for structure.
2 min
Tip: Cami's shortcut note: We skip whipping the egg whites to keep this one-bowl. The texture will still be wonderfully chewy.
- 6
Fold in half of the 200g rhubarb. Scrape the batter into your prepared pan, smoothing the top. Scatter the remaining rhubarb evenly across the surface and sprinkle with the final 2 tbsp granulated sugar. Let the batter rest on the counter for exactly 10 minutes.
12 min
Tip: Don't skip this. The 10-minute counter rest hydrates the pistachio flour. Skip it, and your crumb goes tight like a bad alibi.
- 7
Bake for 30 to 35 minutes. You are looking for edges that are deeply browned and pulling away from the sides of the pan. The center should feel set with a very slight wobble when tapped.
35 min
Tip: Financiers should be heavily caramelized on the outside to contrast the lacy, chewy interior. Do not underbake the edges.
Chef's Notes
Butter is not a garnish here. Use high-fat cultured butter for the beurre noisette—it builds the entire flavor profile, playing against the sharp rhubarb. I love serving this warm, straight from the pan, with absolutely nothing else. We're not suffering for a Tuesday night dessert.
Camille Roux
Café-level bakes, weeknight methods, zero compromise.
Camille “Cami” Roux was born in Paris with flour in her hair and a healthy skepticism of culinary dogma. She grew up around neighborhood boulangeries that treated crust and crumb like religion—but what stuck with her wasn’t rigid tradition. It was the quiet precision: good butter that actually tastes like milk, patient fermentation that builds flavor for free, and desserts that know when to stop before they get cloying. After moving to the Bay Area, Cami trained in a bread-and-pastry scene obsessed with texture, naturally leavened doughs, and seasonal fruit—Tartine energy, minus the martyrdom. She became known for loaves that sing when they cool, jammy tarts with clean edges, and “how is this so good?” weeknight pastries made with a few smart shortcuts. Her motto is high impact, low fuss: splurge where it counts (butter, salt, time), streamline the rest (sheet pans, one bowl, cold-proofing). If it doesn’t improve flavor or structure, it doesn’t earn a step.