First, make the cinnamon sugar tortilla chips. Preheat oven to 350 degrees. Line a large baking sheet with parchment paper or a Silpat baking mat. Set aside.: The oven should smell faintly warm as it approaches 350 degrees, and the air will feel dry which helps the chips crisp. I like to test the rack placement so the chips bake evenly. If the rack is too low the chips may brown too quickly at the edges, and if it is too high they might not get uniformly crisp. A common mistake is skipping the parchment, which can cause sticking and uneven browning. Prepare multiple baking sheets if you have them, because crowded chips steam instead of becoming crisp. Listen for the quiet pop and slight crack as they start to harden, that tells me they are nearly done.
Combine sugar and cinnamon in a small bowl until well combined. Set aside.: When you mix the 1 cup granulated sugar and 4 tablespoons ground cinnamon you will see a uniform sandy brown powder, and a warm cinnamon aroma will lift from the bowl. Mixing thoroughly ensures each chip gets consistent seasoning. If the cinnamon is clumped, break it up with the edge of a spoon. A common misstep is adding too much cinnamon relative to sugar which can create intense pockets of spice, so measure carefully.
Lay out your tortillas. Brush a thin layer of butter over the tortillas, only on one side. Sprinkle cinnamon sugar generously over buttered tortillas.: As you brush the melted 1/2 cup unsalted butter , the surface should glisten but not pool. The butter helps the cinnamon sugar adhere and promotes golden color. Sprinkle the cinnamon sugar evenly, and you should see a light dusting that will caramelize slightly in the oven. If you apply too much butter the chips become greasy, and if you add too little the sugar will not stick. Aim for an even sheen and a consistent dusting for the best texture and color.
Using a pizza cutter or sharp knife, cut tortillas into triangles. I get 8 triangles out of every tortilla.: Cutting the tortillas into triangles gives even, bite sized chips. Use a firm press with a pizza cutter to get clean edges, and you will notice less tearing than with a dull knife. The visual cue is a uniform triangle shape that stacks well on the baking sheet. A frequent error is cutting them too small which can cause overbrowning, so aim for roughly 8 pieces per tortilla for consistent baking time.
Place tortilla triangles on the prepared baking sheet, in an even layer, making sure they don’t overlap. You will need to bake them in batches because they all won’t fit at the same time. Bake the tortillas for 8 to 12 minutes or until edges start to turn golden and they crisp up.: As they bake you will see the sugar melt slightly and the edges deepen to a warm golden brown. The kitchen will take on a toasty, cinnamon scented warmth. Keep trays spaced and avoid overlap, because overlapping causes steaming which yields limp chips. An easy troubleshooting tip is to rotate the pan halfway through baking if your oven has hot spots. Remove chips just before they look fully done because they continue crisping as they cool.
Keep an eye on them because once they start to crisp up, they will be done quickly. Remove from the oven and cool completely. Repeat until all of the tortillas are baked. Once cooled, place in bowl.: Cooling is key, because the true texture is achieved as steam leaves the chip and the sugar sets. On the counter the chips will crack lightly when touched, and that audible crisp is how I know they are ready. If you rush cooling by stacking them warm they can steam and soften, so spread them out on a rack if possible. A common mistake is storing warm chips right away which traps moisture, so ensure they are fully cool before containing.
To make the fruit salsa, in a medium bowl, combine the strawberries, blackberries, nectarines or peaches, and kiwi. Add the lime juice and gently stir to combine. Taste and sweeten with honey, if desired. Serve with cinnamon tortilla chips.: When you toss the 16 oz strawberries , 18 oz blackberries , 6 nectarines or peaches , and 7 kiwi , the bowl should look vibrant with contrasting colors and varying textures. The lime juice will smell bright and citrusy, and the fruit will glisten as juices mingle. Stir gently to avoid crushing the softer berries; a light fold preserves shape and prevents a soupy result. Taste for balance and add honey incrementally, because over sweetening can mute the fresh fruit flavors. A common pitfall is chopping fruit into wildly different sizes which makes the mouthfeel uneven, so aim for similar dice for each fruit. Serve the salsa in a wide bowl with the cooled chips around the edges so guests can scoop and enjoy the contrasting textures.