How to prevent soggy crust for rhubarb squares?

Cobbled together a recipe for rhubarb squares or (crisp) that initially tastes great. After a day or two the crusts get soggy.
I do not mind the top layer so much, but not the bottom.
Covering the squares or putting in a covered container is a definite no no.
Would putting an egg wash or some other glaze on the bottom layer and doing a short pre-bake help?

Bake the bottom crust about 7-10 minutes w/o anything in it. Taking out after about 5 min and brushing w/ a beaten egg white is not a bad idea, either.

And be sure you have enough flour (or cornstarch, or instant tapioca) w/ your rhubarb to absorb and hold onto all the juice. If the juice is held by the starch, it won’t seep into the crust.

6 Responses to “How to prevent soggy crust for rhubarb squares?”

  1. yes. pre bake it with an egg wash that will give you a better seal or even use some fuit preserves to brush across crust. then bake then fill
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  2. well I know that to have a crusty shell for baking, you can glaze the top with milk.
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  3. A prebake would definitely help. It what I do with Lemon Bars. An eggwash and glaze would get wet after a while.
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  4. An egg wash (or heavy cream wash) and pre-baking the crust might help. You might also put a thin layer of graham cracker crumbs over the crust…….
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  5. Pies do the same thing. Rhubarb has a lot of juice. Try an egg wash and mixing in some cornstarch with the rhubarb ( it will thicken the sauce.)
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  6. Bake the bottom crust about 7-10 minutes w/o anything in it. Taking out after about 5 min and brushing w/ a beaten egg white is not a bad idea, either.

    And be sure you have enough flour (or cornstarch, or instant tapioca) w/ your rhubarb to absorb and hold onto all the juice. If the juice is held by the starch, it won’t seep into the crust.
    References :

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