Mi Mundo Coffeehouse & Roasters expanded its Round Rock footprint in April with a second location opening inside the H-E-B Plus grocery store at the corner of Hwy. 79 and A. W. Grimes Boulevard. What you need to know The coffeehouse celebrated the opening of its second Round Rock shop with a ribbon-cutting April 10, according to the business. The new location inside the grocery store has cafe seating. About the business Mi Mundo offers organic coffee, espresso drinks, teas and smoothies.