cockles of one's heart

This is capital stuff! it warms the cockles of one’s heart as it goes down; but, poor me! when, oh when, shall I have sixpence in my pocket to buy another quart? 

In America the only cockles we talk about are the cockles of one's heart, and we really have no idea what those are.

A coal fire then was a sight to cheer the cockles of one’s heart, to look forward to for one long stage, and to think of for another. 

Dipped in tepid water and used as a sponge these bath bags make a velvety lather that softens and whitens the skin in a way that warms the cockles of one's heart.

It was a feast of humour and a flow of fun, better than all the yule-tide fare that ever was provided—fuller of good things than any Christmas pudding of plums and candied fruit-peel—more warming to the cockles of one's heart, whatever those may be, than the mellowest wassail-bowl ever brimmed to over-flowing.