まごころをこめて
wholeheartedly; with all one's heart; cordially; sincerely
Also written 真心をこめて、まごころを込めて
Expression, Adverb
当店とうてんのパンは、職人しょくにんがひとつひとつ真心まごころを込こめて焼やき上あげています。
The bread in our shop is carefully baked one loaf at a time by our artisans with heartfelt dedication.