By Vassia Barba America’s most beloved grocery chain has been named – and it’s not Walmart or Costco. H-E-B has been declared the favourite grocery retailer of consumers in the US, according to the latest dunnhumby Retailer Preference Index (RPI). The RPI is a study conducted nationwide that explores the $1 trillion US grocery market. H-E-B has secured the top spot for the third time, beating major players such as Amazon and Trader Joe’s, both of whom have previously held the top spot twice. The H-E-B Grocery Company operates over 380 stores in Texas and Mexico. As of 2022, the company had a r…