© Denzil Green
Green Peppers are the large, green sweet bell peppers that are very common in North American and UK cooking. If a recipe calls for Green Pepper, this is the Green Pepper it means — as opposed to say, Jalapenos.
There is more information on Green Peppers in the entry on Bell Peppers.
Remove the seeds and discard them. They have no taste and will just get stuck in your teeth.
1 large bell pepper = 1 cup seeded and chopped
1 green pepper = 1/4 cup dried green pepper flakes (Source: So Easy to Preserve, 2014, page 364.)
5 tablespoons dehydrated green pepper powder = 40 g (1.4 oz)
See entry on Bell Peppers.