2 3/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
1 cup butter, softened
1 cup firmly packed dark brown sugar
1/2 cup granulated sugar
1 tablespoon vanilla extract
4 large eggs
1 cup buttermilk
12-ounce package (2 cups) semisweet chocolate mini-morsels
Preheat oven to 350°. Grease and flour 12-cup Bundt pan.
Whisk together flour, baking soda, and salt.
Beat butter, brown sugar, granulated sugar, and vanilla at medium speed with a heavy-duty electric stand mixer 3 to 5 minutes or until fluffy. Add eggs, 1 at a time, beating just until blended. Add flour mixture alternately with buttermilk, beginning and ending with flour mixture. Beat at low speed just until blended after each addition, stopping to scrape bowl as needed. Beat in chocolate mini-morsels. Spoon batter into prepared pan.
Bake 50-55 minutes or till tooth pick inserted into cake comes out clean. Cool on rack 10 minutes, then remove cake from pan to finish cooling. Dust with powdered sugar to serve if desired.