[Pseudoscience-is-malarkey (OP)]

The internet is unclear on this question. But at 120-150 calories per teaspoon, is it safe to say it takes the prize in all known earth substances that are consumed?

[Bored chemist]

120-150 calories per teaspoon

I doubt that's correct.

is it safe to say it takes the prize

No
All fats are pretty similar- about 9 Kcal per gram, iirc.

[vhfpmr]

The calorific value of sesame oil  is 898 kcal/100g, and  a teaspoon is 5ml, or 4.6g.

So 898*0.046 = 41.3kcal/teaspoon, or 123.9kcal/tablespoon.