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1
Cream the butter, sugar and brown sugar together.
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2
Start on a slow speed until blended, then turn it up to the highest speed until it is light and fluffy.
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3
Add the eggs and vanilla to the mixture and mix on medium speed until the eggs are fully broken up and combined.
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4
Do not over mix this part.
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5
Sift the flour, baking powder, and salt together, add to the mixture and mix until combined.
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6
Add the sour cream and buttermilk and mix until combined.
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7
Add the espresso, and mix until it is combined.
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8
If you are using hot espresso shots, then pour them slowly into the mixture so that it does not begin to cook the eggs.
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9
Add the chocolate chips and mix them until combined.
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10
Preheat the oven to 275 degrees F.
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11
Grease and flour a bundt cake pan.
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12
Scoop the cake mixture into the prepared pan.
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13
Place the cake on a cookie sheet and bake for 1 hour and 45 minutes to 2 hours, or until an inserted knife comes clean from the cake.
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14
Placing the cake on a cookie sheet is just a suggestion to keep your oven clean, in case the cake mixture spills over the sides of the pan.
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15
Let the cake cool, then remove it from the pan upside down.
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16
Garnish it with powdered sugar.
