This study examines whether food stamp participation alters food preparation time and the types of food consumed. Data on time use from the 2006-2008 American Time Use Survey (ATUS) and on food consumption from the 1999-2004 National Health and Nutrition Examination Survey (NHANES) are used. Multinomial treatment effects models of food preparation and consumption that account for the endogeneity of employment and food stamp participation decisions are estimated. Among part-time food stamp participants, results show an increase in food preparation time by 10 minutes (48 percent) compared to what they would have spent in absence of the program. However, food stamp participation is associated with a 30-percent higher share of calories from convenience foods for this group. Food preparation time of nonworkers is not affected by food stamp participation, but nonworking participants significantly decrease consumption of convenience food calories and carbonated or sweetened beverages