ingredients for lemon poppy seed shortbread cookies

Butter temperature matters for baking! And it’s likely that “room temperature” butter is cooler than you think, at about 65°F. It will feel cool to the touch and soft enough that a pressed finger will leave an indent, but it should not be soft enough that your finger can press all the way through. If it’s shiny or melty at all, the butter is too warm.

For best results, let your butter sit on the counter for 30-60 minutes (depending on the temperature of your kitchen). Cutting the butter into cubes increases surface area, speeds up the process, and ensures it softens evenly. I never recommend microwaving your butter, but as an absolute last-resort you can microwave in 5-second bursts, rotating it after each burst.