I blind baked the two doughs by lining a standard muffin tin (3 wells for each dough), freezing it to firm up the dough, then lining with papers and using sugar in place of dried beans as my weight, a tip learned from Stella Parks of “Brave Tart” fame. While the sugar doesn’t toast for very long this way, you can still save the sugar and use it in your shortbread or tart dough recipes to give them a hint of toasty-ness.
Once the blind baked shells were cool, I lined the remaining empty wells, 3 with each dough and proceeded with the fillings.
When making the filling, it is suggested that one use very soft or melted/cooled butter and blend the filling by hand so as to avoid incorporating air into the mix, resulting in a final, enhanced gooey-ness. I chose to keep it simple, not adding nuts or raisins as some iterations do.
The full NYT recipe blends 200 grams brown sugar ( I used dark) with 1/2 teaspoon salt; blend in 57 g soft, unsalted butter by hand until smooth, followed by 1 large egg and a teaspoon vanilla (pretty easy, eh?). The second NYT version I made replaces the 200 g brown sugar with 150 g brown sugar and 1/4 cup maple syrup with the remaining ingredients the same (meant to result in a runnier filling that some reportedly prefer).
Little Sweet Baker’s filling blends 150 g brown sugar with 75 g melted and cooled butter; add in 1 large egg, I teaspoon vanilla and 1 tablespoon heavy cream. Again, easy-peasy.
For my testing purposes I used half recipes (for the egg, whisk up one egg then weigh out 25 g which is about half a large egg.)