"Tsp chili" is an abbreviation that stands for "teaspoon of chili." It means you should add a small amount (one teaspoon) of chili seasoning or chili powder to a recipe to add a spicy or hot flavor. Full definition
I used 1 tsp chili powder in place of the paprika. (myrecipes.com)
Add corn, 1/2 tsp chipotle powder and 1/2 tsp chili powder. (karalydon.com)
Batter Ingredients: 1 cup chickpea flour 1/2 tsp salt 1/2 tsp fresh ground black pepper 1/2 tsp turmeric, dry ground 1 tsp chili flakes 1 tsp cumin seeds, crushed 1/2 cup water Mix all the batter ingredients very well, taste for salt. (fooddrink-magazine.com)