Heat oven to 350°F.
Beat cream cheese, butter, and sugar until fluffy.
Beat in eggs and vanilla.
Mix flour, baking powder, and salt; add to batter.
Spread into a greased 9-inch square pan. Bake 10 mins.
For crumbs, combine flour, brown sugar, cinnamon, and salt. Stir in melted butter until large crumbs form.
Sprinkle all crumbs over batter and bake an additional 20-25 mins