• Make milk chocolate brownies in a 13x9 baking pan using the Cake-Like Brownie instructions (usually, that is just adding an additional egg to the batter)
• Let the brownies cool

For summer Olaf:

• Cut brownies into 3&1/2"x3&1/2 inch squares

For Fall Olaf:

• you can cut brownies into 3&1/2x2&1/2 inch rectangles

Decorating Brownies: 

• Frost brownies (blue for summer Olaf, brown for Fall Enchanted Forest)

Assembling Olaf - this the same for either Movie Theme: 

• (Images are taken from my Olaf Jello Treat to help aid you in assembling him)
• Turn the large marshmallow on its' side and cut it into 2 pieces - you should cut it about 2/3 of the way down, giving you one large piece for the big belly and one skinny piece for his head
  
• *the image above is from my Olaf Jello Treat and shows the marshmallow cut into 3 pieces. This time, I opted to do 2 pieces with one larger for his big belly
• Place the headpiece down - this piece should vertical so the oval is long for face features
  
• Under that, place a mini marshmallow turned sideways
• Now, under the miniature marshmallow, place the large portion of your cut marshmallow - sideways, so the oval tips are on their side
• 2 miniature marshmallows go under the belly for feet

Olaf's buttons, hair, and face

• Pipe 2 black buttons on the bottom large marshmallow and 1 black button on the middle miniature marshmallow
• Then, using the black frosting, pipe 2 round eyes and a smile on his face
• Use brown frosting to make 3 strands of hair on Olaf's head, and his eyebrows
• *Note - his hair can be a bit tricky as the frosting goes off of the marshmallow. Just do your best to do 3 short strands. I had to go back and add some more in if anything fell off the side. Once you figure the hair out, the rest is easy.

Olaf's arms: 

• Fall (Enchanted Forest Olaf)
• I split a pretzel stick in half for Olaf's arms. Sometimes, I pointed his arms downward, and sometimes upward
• *The pretzel lengths may vary per brand - just eye it.

In summer Olaf:

• I piped the arms with brown frosting, but you could also use the pretzel sticks

Specific Decorations for Olaf in Summer: 

• Place  a cocktail umbrella in Olaf in Summer Brownies

Specific Decoratins for Olaf in Fall (Enchanted Forest) 

• Sprinkle fall leaves around Olaf, piling them up a bit around his body