3/4 cupgranulated sugar plus 3 tablespoons for rolling
2large eggsroom temperature
2largeegg yolksroom temperature
1tablespoon canola oil
1teaspoon pure vanilla extract
3 ouncessemisweet or bittersweet chocolate
1/2cupDutch process cocoa powder
Adjust an oven rack in the middle of the oven. Preheat the oven to 350 degrees. Line 3 sheet pans with parchment paper.
In a small bowl, whisk together the flour, baking powder, and baking soda.
In a large bowl, whisk together 3/4 cup of the granulated sugar, the brown sugar, eggs, yolks, canola oil, vanilla and salt.
Place the butter and chocolate in a small, heavy bottomed saucepan set over low heat and melt together, stirring frequently to prevent the chocolate from scorching. Continue cooking until the mixture is smooth. Off the heat, add the cocoa powder to the chocolate and whisk until completely combined, about 45 seconds.
Add the warm chocolate-butter mixture to the egg mixture and whisk together until combined. Add the flour mixture and use a rubber spatula to mix gently until combined. Let the mixture sit at room temperature for 10 minutes.
Combine the confectioners sugar and the remaining 3 tablespoons of granulated sugar in a small bowl. Scoop the dough into 1 1/2 ounce portions (2 tablespoons). Roll the dough in the sugar mixture. Place 7 cookies on each sheet pan.
Bake one pan at a time, rotating halfway through baking. Bake until the edges are set and the cookies are puffed but still soft in the center, 8 to 9 minutes for very soft cookies, and 9 to 10 minutes for a cookie with firm edges and a tender center.
Transfer the sheet pans to a wire rack and let the cookies cool to room temperature. Cookies can be stored in an airtight container at room temperature for up to 3 days.
The dough is very sticky, so using a cookie scoop work best here; I like to drop the dough balls into the sugar and then gently roll them. Once they are covered, they are easy to pick up. If you don't have a cookie scoop, you can refrigerate the dough for 15 minutes or so to help it scoop easier.