The success of her multi-award-winning chocolate business, Grá Chocolates, has brought great highs for Gráinne Mullins since she took a leap of faith to open the business from her parent’s shed during the pandemic in July 2020. In just four years, the pastry chef’s signature chocolates are now stocked in some of the most prestigious stores in Ireland, such as Brown Thomas, and abroad. She now rents a production unit to keep up with demand, and last year landed a spot on the Forbes 30 Under 30 list. The highs are high but, as with any small enterprise, the lows…