I made 9 times this recipe for filling Brave Tart's Homemade Oreos. I made it exactly as the recipe stated, but even after 15 minutes in the stand mixer, it was grainy and chunky, not creamy. I tried using an immersion blender, but it didn't work at all. I tried reheating it, and it made it worse.
I probably shouldn't have tried making that much at once, but now I have 1,500 cookies to fill and I hope I can save this filling. Any ideas?
Here's the recipe (9x the original): 54 oz. unsalted butter (melted, water cooked off and solids strained out) 3 T. vanilla 1 1/8 tsp. Diamond Crystal salt 76.5 oz. confectioners sugar
Strain the hot butter into a stand mixer bowl. Add vanilla, salt, then sugar. Beat until creamy (original recipe said for about 5 minutes).
Note: This is meant to be used warm, as it sets up between cookies and is quite firm.