These unique and delicious oatmeal cookies are a textural delight: crispy on the edges, soft and chewy in the center, and studded with chunks of cinnamon-spiced dried apples and crunchy toffee bits throughout.
Preheat oven to 325 degrees F, 350 degrees F if you don't want your cookies to spread as much. Line two heavyweight, light to medium colored baking sheets with parchment paper.
In a mixing bowl or the bowl of a stand mixer, cream butter until fluffy. Add sugar, brown sugar, baking soda and salt and beat on medium-high speed until light and fluffy, about 2-3 minutes.
Add eggs, one at a time, mixing until each egg is incorporated and emulsified, scraping down the side of the bowl between as necessary.
Add flour and cinnamon and mix on low speed until flour is almost fully incorporated; add oats and mix until just combined. Mix in apples and toffee bits.
Scoop balls of dough onto prepared cookie sheet, using a medium (#40) cookie scoop (or a scant 2 tablespoons of dough), leaving 2-3 inches of space between cookies as they will spread quite a bit.
The shape in which the cookies bake depends on a lot of factors, primarily the dough temperature and shape. If you want flatter cookies like mine, use room temperature dough and press down the balls slightly into puck shapes (it's pretty sticky, but should be doable). For thicker cookies, chill the dough for 20-30 minutes and leave the balls fully formed. I recommend baking off a test cookie or two to make sure you like the shape first.
Bake for 13 to 15 minutes at 325 degrees, or 9 to 11 minutes at 350 degrees, until edges are golden brown and centers are no longer raw looking.
Remove from oven and immediately swirl a large round cookie cutter around each cookie to tuck in the edges and shape the cookies into perfect circles (you can also use the concave side of two spoons to achieve something similar). Let cool for 10 minutes on cookie sheets, then transfer to a wire rack to cool. Repeat with remaining dough, being sure to let the cookie sheet cool completely before scooping more dough onto it. You can reuse parchment, wipe off any greasy bits with a paper towel and you can use the same sheets to bake this entire batch.
Store cookies in an airtight container for up to 5 days.