Red Velvet Cookie Dough Bars

INGREDIENTS

1/2 cup

unsalted butter (room temperature)

3/4 cup

brown sugar (light, packed)

1 tsp

vanilla extract

2 cups

all-purpose flour

14 oz

sweetened condensed milk (1 can)

12 oz

semi-sweet chocolate chips (2 cups)

red food coloring (see notes below)

12 oz

semi-sweet chocolate chips (2 cups)