01 - Preheat oven to 350°F. Line a 9-inch square baking pan with parchment paper, allowing excess paper to hang over sides for easy removal later.
02 - In a large bowl, whisk melted butter, granulated sugar, and brown sugar until completely smooth. Add eggs and vanilla; beat until mixture becomes glossy and well-combined.
03 - Sift flour, cocoa powder, and salt into the wet mixture. Gently fold together until just combined—avoid overmixing to prevent tough texture.
04 - Spread batter evenly in prepared pan. Bake 25–28 minutes until a toothpick inserted in center emerges with a few moist crumbs. Cool completely in pan before topping.
05 - Melt butter in a medium saucepan over medium heat. Stir in brown sugar, cream, and salt. Bring to gentle boil, stirring constantly for 2–3 minutes until thickened.
06 - Remove from heat; stir in vanilla and pecans until coated. Pour praline mixture over cooled brownies, spreading evenly to edges. Let set 20 minutes before cutting.