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Preheat oven to 350. Grease a medium sized loaf pan, 8 1/2 x 4 1/2
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In the microwave or over a double broiler, melt the chocolate chips until smooth. Set aside.
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In a small bowl, mix 6 Tbsp cocoa powder and 2 Tbsp canola oil until smooth. Set aside.
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With a standing mixer or hand held mixer beat butter until light and fluffy. Add in brown and white sugar and beat until well combined.
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Add in eggs, 1 at a time, mixing after each addition.
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Add in both melted chips and cocoa powder mixture, beating just until blended.
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In a medium bowl, sift together flour, baking soda, salt, and espresso powder.
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Gradually add dry mix to the wet mix alternately with greek yogurt, beginning and ending with flour mixture. After each addition, beat at a low speed, just until blended.
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Slowly pour in hot coffee, beating at a low speed just until combined. Stir in vanilla.
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Pour into a greased medium sized loaf pan.
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Bake for 50-60 minutes, or until cake tester comes out clean.