In a large bowl beat butter, shortening, and banana until combined and creamy. Add sugars; beat on medium until very light, 3 minutes. Scrape bowl; beat in eggs and vanilla bean paste. Add flour, oats, cornstarch, baking soda, and salt; beat just until combined.
Place 3/4 cup regular rolled oats in a food processor or blender. Cover and process until ground.
Make Candied Walnuts: Place granulated sugar in a 10-inch skillet. Heat over medium until sugar starts to melt. Gently stir any melted sugar into unmelted sugar until all of the sugar is melted and golden. Stir in salted butter until melted. Stir in chopped walnuts until coated. Cool on a piece of foil. Chop before adding to dough.
In a medium bowl stir together Candied Walnuts, banana chips, and 1 cup of the coconut. Remove and set aside half of the mixture. Stir remaining walnut mixture into dough. Cover and chill dough 30 minutes.
Line a tray or cookie sheet with parchment paper. Place remaining coconut in a shallow dish. Portion dough into eight even pieces. Shape the portions into balls. Gently dip half of each dough ball into coconut. Place coconut side up on prepared tray. Freeze 4 to 24 hours.
You can transfer frozen dough balls to an airtight container and freeze up to 3 months; bake as directed.
Adjust oven rack to middle position. Preheat oven to 400ºF. Arrange half of the dough balls on a parchment-lined cookie sheet. Bake 6 minutes (do not open oven). Adjust oven to 350ºF and bake 12 minutes more. Carefully sprinkle some of the reserved walnut mixture over dough balls; gently press in with the back of a spoon (be careful not to flatten). Bake until lightly browned, 2 to 4 minutes more. Remove from cookie sheet; cool completely. Repeat with remaining dough balls.
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How to Store Banana Bread Cookies
Place baked cookies in an airtight container at room temperature up to 3 days or freeze up to 3 months.
Credits
Recipe developed by Madalyn Bendgen And Colleen Weeden.