Well what do you do with left over brioche a day later? Dorie Greenspan recommends making bostock. Bostock is basically 1/2 - 3/4" thick slices of stale brioche with 3 Tbs of almond creme spread on top and then baked in the oven till golden brown and puffed.
Though I changed her recipe a tad, wow did it smell and taste wonderful. The recipe called for blanched almonds. I only had slivered almonds and therefore couldn't blanch them myself since they were already cut. The skins gave it a more "rustic" look. I liked that. If you are looking for a perfectly smooth look, then buy them blanched or buy whole and blanch them yourself. I believe they sell sliced blanched in the stores. I also used vanilla paste instead of extract which added more texture with vanilla seeds. But I always think that the flavor is worth the change in color and look.
Makes about 1 1/2 cups
3/4 stick (6 Tbs) unsalted butter, at room temperature
2/3 cup sugar
3/4 ground blanched almonds 2 tsp all-purpose flour
1 tsp cornstarch
1 large egg
2 tsp dark rum or 1 tsp pure vanilla extract
I used the food processor method and used 1 tsp vanilla paste AND 1 tsp rum emulsion. I was out of dark rum, thanks to the rum raisin icecream I made...well worth it by the way, and did not have any rum extract on hand...which is fine too because this rum emulsion is much much better! What are emulsions? Emulsions are water-based, alcohol-free alternatives to extracts. Instead of using alcohol, the flavor is micro encapsulated in natural stabilizers and suspended in water. The encapsulation enables the flavor to not lose its integrity when exposed to high heat.
TO MAKE THE CREAM USING A FOOD PROCESSOR: Put the butter & sugar in the food processor and process until the mixture is smooth and satiny. Add the ground almonds and continue to process until well blended. Add the flour and cornstarch and process to blend, then add the egg. Process for about 15 seconds more, or until the almond cream is homogenous. Add the rum and/or vanilla and pulse to just blend.
TO MAKE THE CREAM USING A MIXER OR BY HAND: You can use a hand or stand mixer (fit the mixer with the whisk attachment), or you can blend the cream in a bowl with a rubber spatula. Blend the butter and sugar together until smooth. Add the almonds, beating to incorporate them completely. Blend in flour and cornstarch, then add the egg, beating until the cream is homogenous. Stir in the rum and/or vanilla.
Scrape the almond cream into a container and use it immediately, or refrigerate it until firm (about 2 hours).
Now just cut 1/2" - 3/4" inch slices of your brioche. Spread the bread with about 3 Tbs of the cream, leaving a little border bare (as you can see, I forgot this part but it worked out fine), and scatter over some sliced almonds, blanched or not. Put the bread on a baking sheet lined with parchment or a silicone mat, and bake in a 350 degree-F oven until the almond cream is puffed and golden brown, 10 - 15 minutes. Serve the bostock warm or at room temperature.
I had left over almond cream and after reading, other suggestions for it are: smoothing over th bottom of a crust, then topped with fruit, used intead of pastry cream to fill Brioche Raisin Snails or simply spoon into a ramekin capped with berries and baked like a tart. Almond cream puffs and develops a light crust. Inside, it remains soft and creamy and deeply flavored by the almonds.
I think I'll try the ramekin and berries and let you you know how it is!