Instructions

1. Preheat oven to 400 F (200 C).
2. Trim beets, then peel and pierce each with a fork several times. Wrap each in foil and place on a baking sheet. Roast until fork-tender, 50 to 60 minutes. Set aside until cool enough to handle.
3. Meanwhile, make Cointreau cheesecake mixture. In a medium bowl, combine cream cheese, 2 tbsp (30 ml) sugar, 1 egg, Cointreau and orange zest. Stir with a fork until smooth and well combined. Set aside.
4. Reduce oven temperature to 350 F (175 C). Line a 9-in (23 cm) square baking pan with parchment and set aside.
5. Roughly chop beets and weigh out 8 oz (225 g). Add to bowl of a food processor or blender and purée until smooth, scraping down sides of processor bowl or blender pitcher as needed. Transfer beet purée to a medium bowl.
6. Place butter and chocolate in a medium saucepan and set over medium heat. Stirring constantly with a heatproof spatula, cook mixture until melted and smooth, about 4 minutes. Stir chocolate mixture into beet purée until well combined.
7. In a medium bowl, whisk flour, cocoa powder, baking powder and salt.
8. In a large bowl, combine remaining 4 eggs, vanilla, brown sugar and remaining ½ cup (125 ml) sugar and whisk with a hand mixer until lighter in colour and aerated, about 2 minutes. With a rubber spatula, fold beet mixture into egg mixture until just combined. Add flour mixture and mix until just combined. Pour batter into prepared pan, reserving about ⅓ cup (80 ml), and smooth into an even layer. Top brownie batter with dollops of Cointreau cheesecake mixture and dollops of reserved brownie batter. Using tip of a knife, lightly mix and marble 2 batters together.
9. Bake until a knife inserted into centre comes out with just a few moist crumbs sticking to it, 30 to 35 minutes. Transfer pan to a rack to cool to room temperature. Cut and serve. Bars can be made ahead and stored in an airtight container in refrigerator for up to 5 days.