Preheat oven to 350F and spray your bread pan with non-stick spray.
Add butter and sugar to the mixing bowl, cream until smooth. Add in eggs (one at a time), milk, and vanilla until incorporated.
Slowly mix in flour, salt, and baking powder. Once mixed, fold in apples and nuts.
Transfer mixture into prepared bread pan.
Combine all of the topping ingredients to a bowl. Use a pastry mixer or two knives to cut in butter and mix until crumbly. Sprinkle over batter.
Bake for 1 hr. (or longer, start checking at 1 hr. with tester until it comes out clean from the center).
Let cool for 30 mins and remove from pan.
Store in an airtight container.
