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Preheat the oven to 350 degrees F.
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Grease a 10-inch loaf pan with butter.
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In medium bowl mix together flour, baking powder, salt and cocoa and set aside.
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Pour heavy cream into a microwavable dish and add 5 ounces of chocolate to it. Microwave for 40 seconds, stir and microwave again for 30 seconds and stir until the chocolate is completely melted and combined with the cream. The mixture must be well combined and shiny. Set aside.
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In the bowl of an electric mixer, fitted with the wire attachment, cream together butter and sugar on medium speed until fluffy, about 1 minutes. Add the eggs one a time, beating well on medium - low speed, after each addition. With the motor running on low, add the flour mixture followed by the chocolate mixture. Mix on low until combined.
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Stir in the chocolate chips with spatula.
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Pour the batter into the prepared pan and bake for 1 hour - 1 hour 10 minutes. Check for doneness by inserting a toothpick into the cake, it should come out clean. Start checking at the 50 minutes mark as every oven is different.
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Once baked, cool the pound cake in the pan for 30 minutes before transferring onto a wire rack to cool completely.
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Once the pound cake has cooled, fill a small saucepan with water and bring to a boil and let the water simmer, choose a heat safe bowl that would sit nicely over the sauce pan and add the remaining 5 ounces of chopped chocolate to it.
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The bowl should not come into contact with the water in the saucepan as this can cause overheating. Remove the bowl from the saucepan while there are still a couple of small lumps of un-melted chocolate, stir until completely melted and smooth. If there are a few lumps that didn't melt just put the bowl back over the saucepan of hot water for a minute or two and stir again.
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Pour melted chocolate over the pound cake.