Prep Time 20 minutes mins
Cook Time 11 minutes mins
Resting Time 40 minutes mins
Total Time 1 hour hr 11 minutes mins
For the fudgiest centers, the ganache should be thick like peanut butter before filling; if it gets too firm, microwave it for 5 to 8 seconds to loosen. Keep dough cold between batches to prevent excessive spread, and seal the ganache well so it doesn’t leak during baking. Weighing flour (285 g) improves consistency and prevents dryness; if you don’t have a scale, lightly spoon and level. For chewier edges, bake to the longer end of the time; for softer cookies, pull at first sign of set edges. Store cookies airtight at room temperature for 2 days or freeze filled, unbaked dough balls for up to 2 months and bake from frozen adding 1 to 2 minutes.