Answer:
<h2>Cinnamon</h2>
Step-by-step explanation:
From the given ingredient the recipe is meant for cinnamon-sugar cookies
Given the list
(Cinnamon, Baking Soda, Pure Vanilla Extract, Salt ,Cream of Tartar)
With me here is a typical recipe for the baking of cinnamon-sugar cookies
<em>1 cup C&H® Golden Brown Sugar
</em>
<em>½ cup C&H® Granulated Sugar
</em>
<em>½ cup (1 stick) Unsalted butter, softened
</em>
<em>1 teaspoon Pure vanilla extract
</em>
<em>2 large eggs
</em>
<em>2 ½ cups All-purpose flour
</em>
<em>1 teaspoon Cream of tartar
</em>
<em>½ teaspoon Baking soda
</em>
<em>¼ teaspoon salt
</em>
<em>2 tablespoons Granulated Sugar
</em>
<em>2 teaspoons ground cinnamon</em>
Now 6- 1/4tsp. corresponds to 6(0.25)=1.5tsp
1.5tsp is a close approximation of 2 teaspoons Ground cinnamon in our typical recipe, hence we could predict that Thea added Cinnamon last