Preheat oven to 350 degrees F (180 degrees C).
Grease and line an 8-inch square pan with parchment paper.
66% Cocoa Dark Chocolate (1 2/3 cups)
Butter (1/2 cup)
Unsweetened Cocoa Powder (1 Tbsp)
over low heat until the chocolate melts, then stir in
Brown Sugar (1/3 cup)
until all is incorporated, remove from heat and allow to cool slightly.
Gently fold in
Cake Flour (1/2 cup)
to just combined and do not over beat. Add in
Vanilla Extract (1 tsp)
, and stir well. Spread chocolate batter into the prepared pan.
Canned Pineapple Slices in Juice (5 slices)
over the top, followed by
Walnuts (2/3 cup)
Chocolate Chips (3 Tbsp)
Bake in oven at 350 degrees F (180 degrees C) for about 30 minutes.
After cooling, chill the brownies for at least an hour for easy cutting.