Preheat Oven to 350. Line a 13x9 baking pan with aluminum foil,
Mix together flour, oats, baking soda and salt in a medium bowl. Set aside
Melt butter in a small saucepan, when melted and browned (about 12 minutes) add butterscotch chips and whisk until smooth. Add brown sugar, vanilla and egg
Pour the butter/sugar mixture over the flour and stir until combined.
Spread mixture in greased foil lined pan. Bake until golden brown and a toothpick comes on clean. About 17-19 minutes. Cool on wire rack for about 10 minutes, then using foil overhang, lift bars from pan and cool completely about another 30 minutes