I have tried quite a few versions of homemade taco seasoning trying to find a good one. The packaged stuff always gives my family tummy aches. I found a good one on allrecipes.com (here) and changed it a little to fit our tastes. I had to tame the heat down because my kids are little and don't like things too spicy. I also added cornstarch and beef bouillon like some of the comments suggested.
Homemade Taco Seasoning This recipe makes enough for 1 lb of hamburger. Double, triple, etc for each pound of meat you are using.
3/4 tablespoon chili powder
Brown 1 lb of hamburger. Drain the fat off. Mix all seasonings together and stir into beef along with 1/3-1/2 cup of water.
This is the best sloppy joe recipe I have found. I like them when they aren't too sweet and have just a little tang to them. I found a recipe on allrecipes.com that had killer reviews. I changed it a little to my liking. I decreased the brown sugar and added more mustard. I like to serve mine with sliced dill pickles on the bun. Sometimes we even put a slice of processed cheese on there. Here is the original version.
3/4 cup ketchup
2 teaspoons brown sugar
salt to taste
ground black pepper to taste
Directions
In a medium skillet over medium heat, brown the ground beef, onion, and green pepper; drain off liquids.
Stir in the garlic powder, mustard, ketchup, and brown sugar; mix thoroughly. Reduce heat, and simmer for 30 minutes. Season with salt and pepper.