Preheat oven to 350°F (175°C). Grease and flour a 9x5 inch loaf pan.
In a medium bowl, whisk together flour, baking soda, salt, and cinnamon.
In a large bowl, cream together softened butter and granulated sugar until light and fluffy.
Beat in the eggs one at a time, then stir in the vanilla extract.
Gradually add the dry ingredients to the wet ingredients, alternating with the milk, beginning and ending with the dry ingredients. Mix until just combined.
Fold in the chocolate chips.
Pour the batter into the prepared loaf pan and spread evenly.
Bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean.
Let the cake cool in the pan for 10 minutes before inverting it onto a wire rack to cool completely.
Notes
Best served warm or at room temperature. Can be dusted with powdered sugar or drizzled with chocolate glaze.