01 - In a large mixing bowl, whisk together rye flour, bread flour, caraway seeds, granulated sugar, instant dry yeast, and sea salt.
02 - Pour warm water and melted unsalted butter into the bowl and mix until a shaggy dough forms.
03 - Knead the dough by hand for 8 to 10 minutes, or use a stand mixer fitted with a dough hook for 5 to 7 minutes, until the mixture is smooth and elastic.
04 - Cover the dough and allow it to rise in a warm area for about 1 hour, or until doubled in volume.
05 - Set oven to 425°F and line two baking sheets with parchment paper.
06 - Transfer the risen dough onto a lightly floured surface. Divide it into four equal sections and roll each into a 16-inch rope.
07 - Use a sharp knife or bench scraper to cut each rope into 1-inch pieces, forming small bites.
08 - In a large pot, bring 6 cups water to a boil. Carefully add baking soda—be aware that it will foam.
09 - Working in batches, immerse the pretzel bites into the boiling bath for 30 seconds. Remove each piece with a slotted spoon and arrange spaced apart onto the prepared baking sheets.
10 - Immediately sprinkle the surface of each bite with additional caraway seeds and coarse sea salt.
11 - Bake the bites for 14 to 18 minutes until they achieve a deep golden brown color.
12 - Let the pretzel bites cool briefly and serve warm.