Prepare the Potatoes: Boil the Yukon gold potatoes in a pot of salted water until fork-tender, about 15-20 minutes. Drain and let them cool slightly before mashing until smooth.
Make the Herb Butter: In a small bowl, blend the softened butter with minced garlic, parsley, chives, thyme, olive oil, and a pinch of salt. Mix until well combined and set aside.
Preheat Waffle Iron: Preheat your waffle iron according to the manufacturer's instructions.
Mix Dry Ingredients: In a large mixing bowl, whisk together the flour, baking powder, baking soda, and salt.
Combine Wet Ingredients: In a separate bowl, whisk together the buttermilk and eggs until smooth. Add the cooled, mashed Yukon potatoes and mix until fully incorporated.
Combine Mixtures: Pour the wet potato mixture into the dry ingredients and stir gently until just combined - do not overmix.
Fold in Herb Butter: Gently fold in half of the prepared herb butter into the batter, reserving the rest for serving later. Add freshly cracked black pepper to taste.
Cook Waffles: Lightly grease the waffle iron with cooking spray or a brush of oil. Pour the appropriate amount of batter onto the preheated waffle iron and cook until golden brown and crisp, about 5-7 minutes. Repeat with the remaining batter.
Serve: Serve the Herb Butter Yukon Waffle Bossa Bread hot, topped with the remaining herb butter and garnished with additional fresh herbs if desired.
Enjoy Your Dish!: Savor the combination of buttery, herby flavors with the unique texture of waffle bread. Perfect for brunch or a fancy breakfast!