Method & Formation: From Dough to Delight
This is where the magic happens. Follow these steps for perfect, chewy bars every time.
1. Preparation: Preheat your oven to 350°F (175°C). Line an 8×8 or 9×9 inch square baking pan with parchment paper, leaving some overhang on two sides. This will act as handles to easily lift the bars out later. Lightly grease the parchment.
2. Whisk Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, cream of tartar, and salt. This ensures the leavening agents are evenly distributed.
3. Cream Butter and Sugar: In a large bowl, using a hand mixer or a stand mixer with the paddle attachment, beat the softened butter and ¾ cup of sugar together until light, fluffy, and pale in color (about 2-3 minutes). This process incorporates air, which helps with a tender texture.
4. Add Wet Ingredients: Beat in the egg and vanilla extract until fully combined. Scrape down the sides of the bowl as needed.
5. Combine Wet and Dry: Gradually add the dry ingredients to the wet ingredients, mixing on low speed just until combined. Do not overmix! Overworking the gluten will result in tough, cakey bars instead of chewy ones.
6. Form the Dough: The dough will be thick and slightly sticky.
7. Make the Topping: In a small, shallow bowl, whisk together the ¼ cup of sugar and the cinnamon.
8. Assemble the Bars: Transfer the dough to the prepared baking pan. Using lightly dampened fingers or a spatula, press the dough into an even layer. Sprinkle the cinnamon-sugar mixture evenly over the top of the dough.
9. Bake: Bake for 20-25 minutes, or until the edges are set and lightly golden brown. The center will still look slightly soft and underdone – that’s perfect for chewy bars. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter.
10. Cool Completely: Place the pan on a wire rack and let the bars cool completely in the pan. This is crucial. Cutting them while they are warm will cause them to crumble. Once cool, use the parchment paper overhang to lift the entire block onto a cutting board. Slice into squares.
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