Report Abuse. Very very little. 1 teaspoon will substitute for a 1/2 to 1 cup chopped onion. But really there is no substitute for chopped fresh onion. The fresh onion will add a sweetness to the dish and season it without any bitterness or off flavor.JEN Â· 7 years ago. teaspoon will substitute for a 1/2 to 1 cup chopped onion. But really there is no substitute for chopped fresh onion. The fresh onion will add a sweetness to the dish and season it without any bitterness or off flavor. JEN Â· 7 years ago.
Officially, a US Cup is 240ml (or 8.45 imperial fluid ounces.) This is slightly different from an Australian, Canadian and South African Cup which is 250ml.
1 Cup [US] = 39.97 Teaspoons [UK]. For other cooking unit conversions, please go to Cooking Units Conversion. Cups to teaspoons (tsp) conversion factors are listed below. To find out how many teaspoons in cups, multiply by the right factor or use the converter below.1 Cup [US] = 48 Teaspoons [US]. Cup is a volume unit and used mostly in cooking to measure liquid and bulk, dry foods.There is no international standard for cup sizes but mostly united states customary and metric cups are used. The abbreviation is c. Cup [US] = 48 Teaspoons [US]. Cup is a volume unit and used mostly in cooking to measure liquid and bulk, dry foods. There is no international standard for cup sizes but mostly united states customary and metric cups are used. The abbreviation is c.