Before baking with apples, many recipes call for peeling, coring and slicing them according to a slice size. The recipe can specify the number of apples to use and/or the amount of slices by volume (measured in a liquid measuring cup) or by weight (with a kitchen scale). A cup of chopped/sliced apples (again, this will vary slightly with apple variety/freshness and size of dice/slice) weighs about 3 1/2 ounces. So, 1 pound of whole apples translates to about 3 cups of prepared apples because you lose abut 30% of the apple, by weight, when you peel and core them.
Peeling, coring and slicing apples can be quite a chore. Here's a fast and easy way I cut my apples; I do not have to core them first! You can peel apples, after washing them, with a vegetable peeler, paring knife or a gizmo called an Apple Peeler (which can also core them).
This how to baking technique is used with The Ultimate Apple Pie Recipe with a Rum Raisin Sauce.
HOW TO TIPS:
After peeling my apples, I cut 4 slabs of apple, staying well away from the core, and then I simply cut the 4 slabs into slices. It's a lot faster, and easier than using an apple corer. I use a sharp kitchen knife.
In a large bowl, toss the apple wedges with some freshly squeezed lemon juice so they won't brown.
Or, chop the apple slices to the size and measure according to the recipe. Remember to toss with lemon juice so they won't brown.
Ths technique is used with the Apple Walnut Spice Streusel Cake Recipe