Prep Time 30 minutes mins
Cook Time 12 minutes mins
Resting Time 2 hours hrs 30 minutes mins
Total Time 3 hours hrs 12 minutes mins
For the cleanest pinwheel swirl, keep dough cool but workable during rolling and stacking, and use a ruler to trim edges for sharp corners before rolling; if the dough cracks while rolling, let it warm for a minute, and if it smears, chill it for 5 minutes. Dissolving the espresso in hot water prevents gritty specks and intensifies coffee flavor, and you can bump coffee strength by adding an extra 1/2 teaspoon espresso powder. Toffee can melt and spread, so avoid overbaking and let cookies set on the sheet before moving; if using large toffee bits, lightly crush them for thinner rounds. The dough log freezes well double-wrapped for up to 2 months; slice from frozen and add 1 to 2 minutes to the bake time.