Preheat oven to 350°F. Cream butter and sugar in a bowl of a stand mixer on high speed until light and fluffy. Add in remaining ingredients and mix on medium speed until ingredients are completely mixed and smooth batter forms.
Line a 9 x 9 pan with parchment paper. Scrape batter into pan. The batter will be quite sticky and hard to spread. Use a spatula and try to spread across entire surface of pan. Don't worry if it looks uneven as the batter will melt and spread and even out when baking. Bake for about 28 minutes until set and toothpick inserted comes out clean. Let brownies cool for about 1 hour to settle and become dense and chewy before cutting and serving.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.