In a large mixing bowl or the bowl of standing mixer fitter with a paddle attachment, beat the butter and the sugar together. Add the eggs one at a time. Stir in the milk, lemon juice and vanilla extract. Mix to combine. Sift the flour for a second time with the baking powder, baking soda and salt, and then add into the mixing bowl. Mix thoroughly. Gently fold the bananas into the mixture by hand using a rubber spatula. Fold in the chocolate chips.