Preheat the oven to 350°F.
Melt and cool the baking chocolate.
Sift together the flour, baking soda and salt and set aside.
Combine sugar, eggs and oil in a large mixing bowl. Beat with an electric mixer set at medium for 2 minutes. Beat in the beets, cooled chocolate and vanilla. Gradually add the dry ingredients, beating well after each addition.
Pour into a greased 13x9x2” baking pan and bake for 25 minutes or until the cake tests done. Cool the pan on a rack. Once completely cool, sprinkle cake with confectioners’ sugar and serve.