In a large bowl, beat the butter, 1 cup (200g) of sugar and lemon zest with an electric mixer at medium speed, until light and fluffy. Beat in the eggs, one at a time, until incorporated. Beat in the extracts. On low speed, mix in the flour mixture in two additions, followed by half of the sour cream after each addition. Beat just until combined. Do not over mix. Reserve a couple of tablespoons of the chopped cherries. Coat the remaining cherries with 2 teaspoons of flour, then gently fold them into the batter.