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Kids Can Bake: Monster Apple Oat Bars

Bake soft apple-cinnamon Monster Apple Oat Bars with kids. Easy Halloween snack recipe with kid jobs, adult safety notes, kitchen math and science, and edible decorations.

By Henry Hunter, founder of Crust & Crumb Academy and Baking Great Bread at Home.

Prep
20 minutes
Rise
30 minutes cooling
Bake
28-33 minutes
Total
1 hour 25 minutes
Yield
One 8x8-inch pan, cut into 12 bars
Difficulty
beginner

Ingredients

Apple Oat Bars

Thick batter, no mixer, one bowl for dry and one for wet. Kids can measure all of it.

  • 135g (1½ cups) old-fashioned rolled oats — Use certified gluten-free oats if needed
  • 120g (1 cup) all-purpose flour
  • 4g (1 teaspoon) ground cinnamon
  • 4g (1 teaspoon) baking powder
  • 1.5g (¼ teaspoon) fine salt
  • 67g (⅓ cup) packed light brown sugar
  • 50g (1 large) (1 large) large egg
  • 255g (1 cup) unsweetened applesauce
  • 60g (¼ cup) milk — Dairy or unsweetened dairy-free milk
  • 57g (¼ cup) unsalted butter, melted and cooled slightly
  • 5g (1 teaspoon) vanilla extract
  • 110g (about ½ cup packed) small firm apple, finely grated — Peel if you like. Honeycrisp, Pink Lady, Gala, or Granny Smith all work.

Monster Faces (Optional)

Pick decorations that fit your group's allergies and ages. Every face can look different.

  • as needed (as needed) edible candy eyes
  • as needed (as needed) raisins or dried cranberries — Mouths, eyebrows, hair
  • as needed (as needed) mini chocolate chips
  • as needed (as needed) cream cheese frosting, vanilla icing, or sunflower-seed butter — Small dabs to glue decorations on
  • as needed (as needed) thin apple slices — Teeth, horns, or hair

Total flour: 120g

Pro tip: Grated apple puts apple flavor in every bite without big chunks that make the bars hard to slice.

Equipment

Method

Prepare the Pan (Grown-up runs the oven)

Line the pan first so the whole slab lifts out later and slicing stays off the pan bottom.

  1. Preheat. A grown-up preheats the oven to 350°F (175°C).
  2. Line the pan. Line an 8x8-inch pan with parchment paper, leaving an overhang on two sides. Kids can press the paper in and gather the bowls, cups, and spatula.

Tip: Kid job: parchment and tool setup. Grown-up job: the oven.

Mix the Dry Ingredients (Smell the cinnamon)

Everything dry goes in one big bowl. Break up the brown sugar lumps with clean fingers.

  1. Stir the dry bowl. In a large bowl, stir together the oats, flour, cinnamon, baking powder, salt, and brown sugar until the color is even.

Tip: Ask a young baker what the cinnamon reminds them of. That is the whole lesson right there.

Mix the Wet Ingredients (Apple goes in last)

Whisk the wet bowl smooth, then stir in the grated apple so it spreads evenly.

  1. Whisk it smooth. In a medium bowl, whisk the egg, applesauce, milk, melted butter, and vanilla until smooth.
  2. Add the apple. A grown-up grates the apple on a box grater. Kids stir it into the wet bowl.

Tip: Graters and knives are grown-up tools. Everything else in this step belongs to the kids.

Make the Batter (Thick like cookie dough)

Wet into dry, then fold until no flour is left. The batter should hold its shape on the spatula.

  1. Fold it together. Pour the wet bowl into the dry bowl. Fold with a spatula until there are no dry patches of flour. It will be thick, like soft oatmeal cookie dough.
  2. Fill the pan. Scrape the batter into the lined pan and spread it into an even layer, pressing gently into the corners.

Tip: Do not add extra milk unless the batter is too dry to stir. Applesauce brands and oat types vary.

Cool and Slice (Kitchen math time)

Cool at least 30 minutes before cutting, or the bars crumble. Then work out the grid together.

  1. Cool on a rack. Set the pan on a wire rack and cool at least 30 minutes. Lift the slab out using the parchment.
  2. Cut 12 bars. A grown-up cuts 12 bars. Ask the kids first: 3 rows of 4, or 4 rows of 3? Both make 12.

Wait: PT30M

Make Monster Faces (Every monster gets a name)

Decorate only when the bars are completely cool, or the frosting slides right off.

  1. Glue on the eyes. Use a tiny dab of frosting, icing, or sunflower-seed butter to stick edible eyes onto each bar.
  2. Build the faces. Add raisins, dried cranberries, mini chocolate chips, loose oats, or thin apple slices for mouths, eyebrows, hair, and teeth. Let each kid name their monster.

Tip: Check small decorations for age appropriateness before you set the bowls out.

Bake the Bars

Golden edges, a center that no longer looks wet. That is your finish line.

Oven: 175°C / 350°F.

Standard Oven, 8x8 Pan (recommended)

One pan, one rack, no special gear.

Equipment: Parchment-lined 8x8-inch pan

  1. Into the oven. A grown-up places the pan on the middle rack at 350°F (175°C). Kids set the timer.
  2. Bake. Bake 28 to 33 minutes, until the edges are lightly golden and the bars have puffed slightly.
  3. Check doneness. A toothpick in the center should come out clean or with a few moist crumbs. The center should not look wet.
  4. Out of the oven. A grown-up removes the hot pan and sets it on a wire rack.

Note: Oven in, oven out, and the knife all belong to the grown-up. Kids keep the timer and do the watching.

Storage

  • Room temperature: Undecorated or lightly decorated bars keep in an airtight container at room temperature for up to 2 days. In the refrigerator, up to 5 days; let them stand 15 to 20 minutes before serving for the softest texture.
  • Frozen: Freeze undecorated bars up to 2 months. Thaw at room temperature, then add the monster faces before serving.

Decorate only after the bars are completely cool, and only on the day you plan to serve them.

Frequently Asked Questions

Which apples work best in these bars?

A firm, crisp apple like Honeycrisp, Pink Lady, Gala, or Granny Smith. Softer apples turn to mush in the batter and make the bars wet.

My batter looks too thick. Should I add more milk?

Probably not. This batter is supposed to be thick, like soft cookie dough. Only add milk a tablespoon at a time if it is genuinely too dry to stir, because applesauce brands and oat types vary.

Can I make these without eggs or dairy?

Swap the milk for unsweetened dairy-free milk and the butter for melted refined coconut oil or a dairy-free butter. The egg helps them hold together, so an egg-free version will be more crumbly but still tasty.

How do I run this with a whole classroom or troop?

Bake two pans and hand out jobs: reader, measurer, mixer, pan-prepper, timer keeper, and cleanup captain. Rotate jobs between the pans so everyone gets a turn at the fun parts.

Can I decorate them ahead of time?

Decorate the same day you serve. Candy eyes soften and colors bleed after a night in a container. Bake ahead, store the plain bars, and let the kids do the faces right before snack time.

Nutrition

Per serving (1 bar): 164 calories, 26g carbohydrates, 3.7g protein, 5.3g fat, 2.1g fiber, 95mg sodium. Makes 12 servings.