warm the cockles of someone's heart

verb2

1. •
   (old-fashioned) Especially of food or drink (particularly an alcoholic beverage): to cause someone to feel deeply warm and comfortable; to comfort, to satisfy.

   • My sandwiches had gone the way of all good sandwiches, and no wine remained to warm the cockles of my heart, for my flask had long been emptied. — 1871
2. •
   (figurative, old-fashioned) To provide someone with a deep feeling of contentment or happiness.

   • "You mean that great possessions warm the cockles of your heart," I said; "that's because you're all soul. As for me, I must warm my hands in the tea-cozy before I can carve the eggs." — 1902