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lady_morana
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Layer flour, baking soda, salt and baking powder. Then add cocoa powder, sugar, chips and walnut in a mason jar. Seal jar.
To prepare: Preheat oven to 350 degrees and contents of jar mix, 1 cup milk, 1 egg, 2 tablespoons vegetable oil, ¾ teaspoon vanilla. Line muffin cups with paper muffin liner or grease muffin cups. Fill muffin cups ¾ full. Bake for 20-25 minutes or until toothpick inserted comes out clean.