Preheat oven to 325°F and line an 8 inch square metal pan with aluminum foil. Grease foil and set pan aside.

Sift or stir together flour, baking powder, baking soda and salt; Set aside.

Melt butter over medium heat in a small saucepan. Cook just until it starts to brown, then remove from heat and transfer to a medium size mixing bowl. Let cool slightly. Add brown sugar, glucose and vanilla extract. Beat with a hand-held electric mixer on medium speed until combined. Add the egg and beat on high speed for about 3 minutes or until the egg is fully incorporated and the batter is lighter in color and texture. By hand, stir in the flour mixture and nuts; Spread in prepared pan (damp fingertips help).

Bake for 30 minutes until top is firm. Cool on wire rack. Cut into bars.