Preheat oven to 350. Grease a medium sized loaf pan, 8 1/2 x 4 1/2
In the microwave or over a double broiler, melt the chocolate chips until smooth. Set aside.
In a small bowl, mix 6 Tbsp cocoa powder and 2 Tbsp canola oil until smooth. Set aside.
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.
Add in eggs, 1 at a time, mixing after each addition.
Add in both melted chips and cocoa powder mixture, beating just until blended.
In a medium bowl, sift together flour, baking soda, salt, and espresso powder.
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.
Slowly pour in hot coffee, beating at a low speed just until combined. Stir in vanilla.
Pour into a greased medium sized loaf pan.
Bake for 50-60 minutes, or until cake tester comes out clean.