Always wash your bulk lettuce. Most bin salad greens are open to other customers' hands and sneezes. To be safe, wash the mixed lettuce before you eat it. Cook meats thoroughly, but don't overcook them. Don't lick the batter.
Raw eggs can carry dangerous amounts of salmonella.
Cookie and cake batters are yummy, and many of us licked the spoon as children, but that raw egg could be a problem. Wash hands, kitchen surfaces and utensils before and after food preparation. After cutting raw meat on a cutting board, be sure to wash the knife, the board and your hands in hot soapy water before handling produce or other items that may be eaten raw. You don't want to transfer bacteria to a food item where it may multiply. Zap microbes with microwaves or antibacterial agents.