Preheat the oven to 325 degrees F. Grease a 9x5-inch loaf pan with nonstick baking spray.
In a large mixing bowl, combine the sugar, oil, and eggs stirring well to combine. Stir in the buttermilk.
1 cup sugar, ⅓ cup neutral oil, 2 egg, ¾ cup buttermilk
Add the flour and pudding to the wet mixture and gently fold to combine.
1 ½ cup self-rising flour, 1 pkg pistachio pudding mix
Transfer half of the batter to a second bowl. Add cocoa powder to one bowl. Fold gently to combine.
2 tablespoon cocoa powder
Transfer the batters to the prepared pan in alternating spoonfuls. Using a knife, swirl the two types of batters together.
Sprinkle the top with chocolate chips and pistachios.
2 tablespoon mini chocolate chips
Bake for 65 to 70 minutes or until a tester inserted comes out with a few crumbs attached. The internal temperature will read 190 when it's done. Cool on a rack.
2 tablespoon chopped pistachios
Notes
Nutritional values are approximate and based on 1/12 the loaf. Promptly store leftovers in an airtight container, for up to 3 days. Freeze for longer storage.Freezer instructions: Once the cake has baked and cooled on a rack, wrap the loaf tightly in plastic wrap then slip it into a large ziptop freezer bag. Store in the freezer until 8 hours before serving. Thaw at room temperature in this wrappings. Slice and serve.To make your own self-rising flour: sift together 2 ¼ teaspoons baking powder + ¾ teaspoon salt + enough all-purpose flour to make 1 ½ cups.