When baking a cake what does teaspoon and thsp mean?

Answer 1

Teaspoon is a form of measurement. For example, a recipe might call for 1 teaspoon of salt. The salt would then be poured into a teaspoon size measuring spoon, and leveled to get an accurate measurement.

Answer 2

tsp is an abbreviation for Teaspoon a unit of measure smaller than the Tbsp which is an abbreviation for Tablespoon