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In the bowl of an electric stand mixer, fitted with the paddle attachment, cream together the butter and the sugars.
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Scrape down the sides. Add one egg at a time and beat for a minute in between each addition. Mix in the vanilla and molasses. Scrape down the sides as needed.
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In a large mixing bowl, whisk together the flour, baking soda, and cinnamon. Add the dry ingredients to the wet ingredients and mix on low until just combined.
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Add in the oats, cocoa nibs, and walnuts. Mix on low to combine.
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Chill the dough in the refrigerator for an hour.
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Preheat the oven to 350 degrees. Line two large baking sheets with parchment paper and set off to the side.
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Scoop out about 1 and ½ tablespoons worth of dough, roll into a ball, and then place on cookie sheet about 2 inches apart. Bake cookies for 10-12 minutes until lightly golden on the edges. Let them sit on the cookie sheet for two minutes and then transfer to a wire rack to cool completely.
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