Basic Blondies

7 to 8 tbsp. butter, melted
1 c. light brown sugar
1 egg
1 tsp. vanilla extract
1/4 tsp. salt
1 c. flour
1/4 tsp. baking powder
Mix-ins of your choice (see options below)

Preheat oven to 350°F. Line 8- x 8-inch baking pan with foil and spray lightly with nonstick cooking spray.

Melt butter in microwave. Allow to cool for 5 minutes. In the bowl of an electric mixer, mix brown sugar with melted butter and beat until smooth. Beat in egg and then vanilla. Add salt, flour, and baking powder and mix until just combined. Stir in your choice of mix-ins with a wooden spoon. Pour batter into prepared pan and spread to level the top. Bake for 22 to 25 minutes or until set in the middle. Allow to cool on a wire rack before cutting into squares.

Mix-in Ideas:
1/2 to 1 c. chocolate, peanut butter, white chocolate, or butterscotch chips
1/2 c. chopped pecans, walnuts, or almonds
1/2 c. M&Ms
1/2 c. chopped Reese's peanut butter cups
1/4 c. toffee pieces