Make the crumb by mixing together the melted butter, flour, sugar, and brown sugar. Chill until use.
Combine the chopped strawberries, flour, sugar, and lemon juice. Set aside.
Cream the butter and sugar until fluffy, then add the eggs, vanilla, flour, and buttermilk. Spread into an 8x8 pan.
Layer the strawberries on top of the cake batter.
Top with the crumb then bake at 350 F for 55-60 minutes and enjoy!