Prep Time 20 minutes mins
Cook Time 12 minutes mins
Resting Time 1 hour hr 10 minutes mins
Total Time 1 hour hr 42 minutes mins
For the cleanest swirls, avoid overmixing after adding the white chocolate and reroll scraps only once to preserve the marbled look. If your kitchen is warm, keep one dough disk refrigerated while working with the other to maintain crisp edges. Use high-quality white chocolate with cocoa butter (not compound coating) for better melt and flavor, and adjust the neutral oil by a few drops if the chocolate seems thick. For added flavor balance, finish cooled cookies with a light sprinkle of flaky salt or a drizzle of extra melted white chocolate. The dough freezes well for up to 2 months; slice or cut from frozen and add 1–2 minutes to the bake time.