The filling that you choose to put in!
There are many different pie recipes that feature apricots as the main ingredient. Pie recipes such as Apricot Slab Pie and Apricot Crumble Pie use apricots as the main ingredient.
Apples are not the main ingredient in blueberry pie; blueberries are the main ingredient in blueberry pie filling; flour is the main ingredient in the crust.It is possible that a commercial product called "blueberry pie" is actually made with apples as the main ingredient with a few blueberries added for coloring and flavor. Although deceptive, a company might do that because apples are much less expensive than blueberries.
Flour!
Flour
If you are making an apple pie, the recipe will ask you to add many different things - these things are the "ingredients". However the largest quantity ingredient will be the apples and this is the "main" ingredient.
Banana & Toffee Is The Main Flavour, But The Biscuits & Cream Are The Two Main bulking ingredient's.
The main ingredient in pecan pie is pecans. Pecans are an nut grown on pecan trees. Pecan pies also include a pie crust and a creamy brown sugar mixture.
Some delicious recipes using pumpkin meat as the main ingredient include pumpkin soup, pumpkin pie, pumpkin bread, and roasted pumpkin with herbs.
Some delicious recipes using vegan lamb as the main ingredient include vegan lamb gyros, vegan shepherd's pie with lamb, and vegan lamb curry.
Some delicious recipes featuring soft chicken as the main ingredient include chicken Alfredo pasta, chicken pot pie, chicken curry, and chicken stir-fry with vegetables.
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Some delicious recipes featuring purple sweet potatoes as the main ingredient include purple sweet potato fries, purple sweet potato gnocchi, and purple sweet potato pie.