Preheat the oven to 350°F. Grease a 9 x 5 inch loaf pan with butter or line it with parchment paper for easy removal.
In a large mixing bowl, whisk together the eggs, melted butter, honey, milk, and vanilla extract until smooth and fully combined.
Sprinkle the einkorn flour, baking powder, and baking soda over the wet ingredients. Gently stir just until no dry flour remains, being careful not to overmix.
Fold in the shredded zucchini and chocolate chips until evenly distributed throughout the batter.
Pour the batter into the prepared loaf pan and spread the top evenly.
Bake for 55 to 65 minutes, until the loaf is set and a toothpick inserted into the center comes out clean or with a few moist crumbs.
Let the bread cool in the pan for 10 to 15 minutes, then transfer to a wire rack to cool completely before slicing.
Measure zucchini after shredding: Lightly pack the shredded zucchini when measuring so the bread stays moist without becoming dense.
Do not squeeze the zucchini: The natural moisture from the zucchini is important for a soft, tender loaf.
Mix gently: Stir just until the flour disappears to avoid overworking the batter, which can make the bread tough.
Check doneness carefully: If the top browns too quickly, loosely tent the loaf with foil for the last 10 minutes of baking.
Let it cool completely: Allowing the bread to cool before slicing helps it set and keeps the slices clean.
Serving Suggestions: Enjoy slices on their own, spread with butter, or pair with recipes like Homemade Hot Chocolate, or Fig Chia Pudding for easy breakfasts and snacks.