Yukon Golds blend creamy without getting gluey like russets would - their waxy texture is perfect for soup. Cleaning leeks properly is annoying but essential; grit ruins the whole velvety thing you're going for.
Prep Time 15 minutes mins
Cook Time 30 minutes mins
Total Time 45 minutes mins
Keep heat medium-low to prevent leeks from browning. Ensure potatoes are fork-tender before blending.