Take the melted butter in a bowl. Add in the vegetable oil and jaggery powder.
Whisk everything together till everything is blended evenly, this will take around a minute.
Add eggs and vanilla extract and mix again. Wet ingredients mixture is ready.
Using a sieve, sift together the whole wheat flour, cocoa powder and salt. This is required to remove any clumps from the dry ingredients.
Once sifted, with a light hand, gently fold in the dry ingredients with the wet ingredients. Do not over-mix the batter at this stage. I have used hand whisk, but I would highly recommend doing it with a spatula or a spoon.
Add 1/4th cup of chocolate chips at this stage and again fold the chips gently in the batter.
Preheat oven to 350 degree F (or 175 degree C).
Grease an 8*8 inch baking pan with butter/oil and lightly dust with whole wheat flour. Or you can even line the pan with parchment paper. I have used 9*9 inch pan here, but if you want thicker brownies, I would highly recommend 8*8 inch pan.
Pour the batter into the greased/lined baking pan, and smoothen the top. Sprinkle rest of 1/4th cup of chocolate chips on top of the batter.
Bake the brownie batter in the preheated oven for around 20-25 minutes. If you like fudgier brownies, remove the brownie at around 20 minutes. I removed the pan at 24 minutes, so the brownies were less fudgy.
Remove the baking pan from oven and set aside to cool for around 5-10 minutes.
Remove the brownie from pan, and slice it into 16 squares.
Healthy whole wheat chocolate brownies are ready to be served warm, or you can even serve them hot topped with cold vanilla ice cream and/or melted chocolate. Store the brownies in the refrigerator for around a week, or freeze them for upto 3 months. Reheat in microwave before serving for the perfect taste and texture.