Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Preheat oven to 350F., Mix all main recipe ingredients together with a mixer. Pour into a large greased casserole pan., Mix all topping ingredients together and crumble on top of sweet potato mixture. Bake for approximately 35 minutes.
Ingredients, cooked sweet potatoes, sugar, salt, eggs, butter, milk, vanilla, Topping, brown sugar, flour, pecans, butter