Baby Blondies

2 sticks butter
1 1/2 c firmly packed light brown sugar
2 1/4 c all-purpose flour
3/4 tsp baking soda
1/2 tsp salt
2 large eggs
1 1/2 tsp vanilla extract
2 c chocolate chips

Preheat oven to 375F and grease a 9x13 pan. Melt butter in a large microwave-safe bowl. Stir sugar into butter until smooth. In a separate bowl, whisk flour, baking soda, and salt. Beat eggs and vanilla into sugar mixture. Add flour mixture a bit at a time and mix until smooth, thick batter forms. Fold in chocolate chips. Spread batter in pan and bake for 20-30 minutes or until light brown.