chocolate filled walnut oatmeal bars

Ingredients For chocolate filled walnut oatmeal bars

• 1 c

  butter or margarine softened
• 2 c

  light brown sugar packed
• 2

  eggs
• 1 tsp

  vanilla extract
• 1/2 tsp

  instant coffee granules-optional
• 3 c

  quick cooking oats
• 2 1/2 c

  all purpose flour
• 1 tsp

  baking soda
• 1/2 tsp

  salt
• 1 1/2 c

  chopped walnuts, divided
• CHOCOLATE FILLING
• 1/2 c

  butter or margarine
• 2/3 c

  cocoa powder
• 1/4 c

  sugar
• 1

  14 oz. can sweetened condensed milk (not evaporated)
• 1 1/2 tsp

  vanilla extract