There are a lot of credit cards thar offer cash back on groceries stores purchases. Some cards give fixed cash back on all purchases, while another credit cards offer bigger cash back in this category. For example, you may consider the Discover it® Cash Back credit card. The card allows to earn 1% cash back on all purchases. Plus, you are given an opportunity to earn up to 5% cash back at different places each quarter like gas stations, grocery stores, restaurants, Amazon.com and more up to the quarterly maximum, each time you activate (enrolment is required). All cash back you earn your first year will be matched at the end of your first year of cardmembership (provided you are a new cardmember).