Step 1

In a medium bowl, whisk together the flour, baking powder and baking soda. In a stand mixer with the paddle attachment, beat the butter, brown sugar and white sugar on medium-high until well combined, about 3 minutes.Add the peanut butter, miso and oil, then beat, scraping the bowl once or twice, until light and fluffy, about 2 minutes. Add the egg and vanilla and beat again, then scrape the bowl.

Step 2

With the mixer on low, gradually add the flour mixture. Mix, scraping the bowl as needed, just until the dough is evenly moistened, 1 to 2 minutes. Using a spatula, mix the dough by hand to ensure no pockets of flour remain; the dough with be very soft. Press a sheet of plastic wrap against the surface of the dough and refrigerate for at least 2 hours or up to 24 hours.

Step 3

When ready to bake, heat the oven to 350°F with a rack in the middle position. Line 2 baking sheets with kitchen parchment. Put the turbinado sugar into a small bowl. Divide the dough into 18 portions, about 3 tablespoons each, then roll into 1½-inch balls. Dip each in the turbinado sugar to coat one side; set sugared side up on a prepared baking sheet, 9 per sheet. Bake 1 sheet for 10 minutes.

Step 4

Remove the baking sheet from the oven and firmly rap it twice against the counter to deflate the cookies. Bake for another 5 to 7 minutes, or until the cookies have fissured and are golden at the edges. Cool the cookies on the baking sheet on a wire rack for 10 minutes. Using a metal spatula, transfer the cookies to a cooling rack and cool completely. Meanwhile, repeat with the second batch of cookies.