Preheat oven to 325°F. Grease and flour a 10 inch bundt pan.
In the bowl of a stand mixer, fitted with the paddle attachment, or with a hand mixer in a large bowl, cream the butter and cream cheese until smooth.
In a medium bowl, combine the sugar and lemon zest and mix together with your fingertips until the sugar is moistened and fragrant. Add the sugar mixture gradually to the butter and beat on medium speed until light fluffy, about 3 minutes.
Add eggs two at a time, beating well with each addition. Add the flour all at once and mix in. Add vanilla and mix thoroughly.
Pour into prepared pan. Bake at 325°F for 1 hour and 20 minutes. Check for doneness at 1 hour. A toothpick inserted into center of cake will come out clean.
Notes
Store cake at room temperature in an airtight container for up to 3 days.Recipe adapted from allrecipes.