There are a Few Disadvantages to Crock Pot Cooking.
As with all cooking techniques, slow cooking in a crock is not perfect (for all dishes). Though you can do a lot (and probably more than you can imagine), there are some things that just were not meant to be done in a crock pot.
If you are looking at cooking prime cuts of meat, then you do not want to slow cook. An expensive steak or roast will fare better by being quick cooked to lock in the fat and flavor. That marbling costs more, and you cook out the tasty fat if slow cooking. Grill or broil steaks like rib eye. You’ll have meat fit for a king. If you’re cutting corners and go with round steak, then stick that in the crock pot and turn out tender meat that would be tough as leather if cooked fast. Again, a king would be impressed. You’re not looking at less savory meat—just different meat cuts with different cooking requirements.
Though slow cookers are good for all-in-one pot meals, it’s important to consider cooking times and to match items that cook at roughly equal times. When cooking meats, root vegetables (like potatoes and onions) work well. If you throw in quicker cooking items like squash, then you have meat sitting in a big mess at the end. There are ways to get around this problem like cooking the items that need more cooking time and then adding the other items later in the cooking process.
A couple of other slow cooker limitations include:
1. Searing is generally impossible, though some of the newest models with full range temperatures may offset this problem. Most recipes calling for browning meats (to lock in flavor and to add more eye appeal) suggest quickly browning on the stove top before adding meats to the crock pot.
2. Along the same lines, pan frying items like onions and green peppers are generally done in a frying pan on the stove top. The crock simply is not meant to quick cook some of the flavor enhancers.
3. If you want to make items like spaghetti or sauces to go over noodles, you’ll need to cook the noodle on the stove and right before serving. Though there are some recipes (usually calling for canned soup) that allow for all-in-one with pastas, most taste better when combining the convenience of slow cooking the base meat or sauce in the slow cooker with the rather quick addition of the pasta/rice made right before the meal.