For the crumb topping
1 stick unsalted butter, chilled and cubed
1/4 cup, plus 2 tbsp sugar
1 cup flour
1/2 tsp baking soda
1/2 tsp salt
1/2 tsp cinnamon
For the brown butter cake
1 1/2 sticks of unsalted butter
1 cups flour
1 1/2 tsp baking powder
1/2 tsp salt
1/2 tsp nutmeg
1/2 cup brown sugar
1/2 cup sugar
2 eggs
1 1/2 tsp vanilla
1/2 cup sour cream
For the roasted pineapple sauce
1/2 of a fresh pineapple, peeled & cored & then diced
2/3 cup brown sugar
3 tbsp unsalted butter, melted
1/2 tsp cinnamon
1/4 cup of spiced rum (optional)