Hi TDog, I’m having the same problem as you, so I did a little research a few days ago and made this list:
Quinoa – 222 calories per cooked cup
Peanut butter – 100 calories per tablespoon
A medium avocado has 276 calories
Walnuts, hazelnuts, almonds, pistachios, peanuts, raw or toasted – 160 to 190 calories per ounce.
Olive oil – 120 calories per tablespoon
I’m probably going to implement the olive oil, because it’s the easiest. If you mix 10 tablespoons into your drinks and food throughout the day, you’ve added 1,200 calories to your diet. That’s quite a bit. I’ll keep my eyes open on this thread as well for other suggestions.